1. The document presents a generalization of 2-step Hermite integrators using a 2-parameter matrix M(a,b) whose elements are powers of a and b.
2. M(a,b) can be factorized into a lower triangular matrix L(a,b) and an upper triangular Pascal matrix Upas.
3. Explicit forms are derived for the inverse matrices M−1(a,b) which are needed for implementing higher order Hermite integrators.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Gamma Function mathematics and history.
Please send comments and suggestions for improvements to solo.hermelin@gmail.com. Thanks.
More presentations on different subjects can be found on my website at http://www.solohermelin.com.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Gamma Function mathematics and history.
Please send comments and suggestions for improvements to solo.hermelin@gmail.com. Thanks.
More presentations on different subjects can be found on my website at http://www.solohermelin.com.
On Some Notable Properties of Zero Divisors in the Ring of Integers Modulo m ...inventionjournals
The algebraic structure (m , +, ×) is a commutative ring with unity. When we examine the multiplicative structure (m , ×) we noticed that the product of some two non-zero elements is zero, thus the ring (m , +, ×) has zero divisors. In this study, we made some observations on some of the theorems regarding the zero divisors of the ring (m , +, ×).We established some of the properties of the zero divisors of (m , +, ×) . Our results showed that, For an even integer m 6 at least one of the quadratic residues modulo m in (m , +, ×) is a zero divisor also for an odd composite non-perfect square m 15 at least three of the quadratic residues are zero divisors. Furthermore, we have found that if m is composite and can be written as a power of prime p, that is m = p α where α ≥ 2 then: 1. Zero divisors in m are multiples of prime p. 2. Let D denote the set of zero divisors in (m , +, ×) and D D { 0 } , then (a) (D+ , +) is a cyclic group generated by p (b) (D+ , +, ×) is a cyclic ring (c) (D+ , +, ×) is a subring of (m , +, ×) (d) (D+ , +, ×) is an ideal of (m , +, ×) (e) (D+ , +, ×) is a principal ideal (f) (D+ , +, ×) is a prime ideal (g) (D+ , +, ×) is a maximal ideal.(h) (m , +, ×) is a local ring.
On the Adjacency Matrix and Neighborhood Associated with Zero-divisor Graph f...Editor IJCATR
The main purpose of this paper is to study the zero-divisor graph for direct product of finite commutative rings. In our
present investigation we discuss the zero-divisor graphs for the following direct products: direct product of the ring of integers under
addition and multiplication modulo p and the ring of integers under addition and multiplication modulo p2 for a prime number p,
direct product of the ring of integers under addition and multiplication modulo p and the ring of integers under addition and
multiplication modulo 2p for an odd prime number p and direct product of the ring of integers under addition and multiplication
modulo p and the ring of integers under addition and multiplication modulo p2 – 2 for that odd prime p for which p2 – 2 is a prime
number. The aim of this paper is to give some new ideas about the neighborhood, the neighborhood number and the adjacency matrix
corresponding to zero-divisor graphs for the above mentioned direct products. Finally, we prove some results of annihilators on zerodivisor
graph for direct product of A and B for any two commutative rings A and B with unity
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The present paper is a survey on linear multivariable systems equivalences. We attempt a review of the most significant types of system equivalence having as a starting point matrix transformations preserving certain types of their spectral structure. From a system theoretic point of view, the need for a variety of forms of polynomial matrix equivalences, arises from the fact that different types of spectral invariants give rise to different types of dynamics of the underlying linear system. A historical perspective of the key results and their contributors is also given.
This is the entrance exam paper for ISI MSQE Entrance Exam for the year 2008. Much more information on the ISI MSQE Entrance Exam and ISI MSQE Entrance preparation help available on http://crackdse.com
On Some Notable Properties of Zero Divisors in the Ring of Integers Modulo m ...inventionjournals
The algebraic structure (m , +, ×) is a commutative ring with unity. When we examine the multiplicative structure (m , ×) we noticed that the product of some two non-zero elements is zero, thus the ring (m , +, ×) has zero divisors. In this study, we made some observations on some of the theorems regarding the zero divisors of the ring (m , +, ×).We established some of the properties of the zero divisors of (m , +, ×) . Our results showed that, For an even integer m 6 at least one of the quadratic residues modulo m in (m , +, ×) is a zero divisor also for an odd composite non-perfect square m 15 at least three of the quadratic residues are zero divisors. Furthermore, we have found that if m is composite and can be written as a power of prime p, that is m = p α where α ≥ 2 then: 1. Zero divisors in m are multiples of prime p. 2. Let D denote the set of zero divisors in (m , +, ×) and D D { 0 } , then (a) (D+ , +) is a cyclic group generated by p (b) (D+ , +, ×) is a cyclic ring (c) (D+ , +, ×) is a subring of (m , +, ×) (d) (D+ , +, ×) is an ideal of (m , +, ×) (e) (D+ , +, ×) is a principal ideal (f) (D+ , +, ×) is a prime ideal (g) (D+ , +, ×) is a maximal ideal.(h) (m , +, ×) is a local ring.
On the Adjacency Matrix and Neighborhood Associated with Zero-divisor Graph f...Editor IJCATR
The main purpose of this paper is to study the zero-divisor graph for direct product of finite commutative rings. In our
present investigation we discuss the zero-divisor graphs for the following direct products: direct product of the ring of integers under
addition and multiplication modulo p and the ring of integers under addition and multiplication modulo p2 for a prime number p,
direct product of the ring of integers under addition and multiplication modulo p and the ring of integers under addition and
multiplication modulo 2p for an odd prime number p and direct product of the ring of integers under addition and multiplication
modulo p and the ring of integers under addition and multiplication modulo p2 – 2 for that odd prime p for which p2 – 2 is a prime
number. The aim of this paper is to give some new ideas about the neighborhood, the neighborhood number and the adjacency matrix
corresponding to zero-divisor graphs for the above mentioned direct products. Finally, we prove some results of annihilators on zerodivisor
graph for direct product of A and B for any two commutative rings A and B with unity
21st Mediterranean Conference on Control and Automation
The present paper is a survey on linear multivariable systems equivalences. We attempt a review of the most significant types of system equivalence having as a starting point matrix transformations preserving certain types of their spectral structure. From a system theoretic point of view, the need for a variety of forms of polynomial matrix equivalences, arises from the fact that different types of spectral invariants give rise to different types of dynamics of the underlying linear system. A historical perspective of the key results and their contributors is also given.
This is the entrance exam paper for ISI MSQE Entrance Exam for the year 2008. Much more information on the ISI MSQE Entrance Exam and ISI MSQE Entrance preparation help available on http://crackdse.com
Singularities in the one control problem. S.I.S.S.A., Trieste August 16, 2007.Igor Moiseev
Singularities in the one control problem. S.I.S.S.A., Trieste August 16, 2007.
The geometry of strokes arises in the control problems of Reeds–Shepp car, Dubins’ car, modeling of vision and some others. The main problem is to characterize the shortest paths and minimal distances on the plane, equipped with the structure of geometry of strokes.
This problem is formulated as an optimal control problem in 3-space with 2 dimensional control and a quadratic integral cost. Here is studied the symmetries of the sub-Riemannian structure, extremals of the optimal control problem, the Maxwell stratum, conjugate points and boundary value problem for the corresponding Hamiltonian system.
This is the entrance exam paper for ISI MSQE Entrance Exam for the year 2010. Much more information on the ISI MSQE Entrance Exam and ISI MSQE Entrance preparation help available on http://crackdse.com
A New Approach on the Log - Convex Orderings and Integral inequalities of the...inventionjournals
In this paper, we introduce a new approach on the convex orderings and integral inequalities of the convex orderings of the triangular fuzzy random variables. Based on these orderings, some theorems and integral inequalities are established.
Slide 1: Title Slide
Extrachromosomal Inheritance
Slide 2: Introduction to Extrachromosomal Inheritance
Definition: Extrachromosomal inheritance refers to the transmission of genetic material that is not found within the nucleus.
Key Components: Involves genes located in mitochondria, chloroplasts, and plasmids.
Slide 3: Mitochondrial Inheritance
Mitochondria: Organelles responsible for energy production.
Mitochondrial DNA (mtDNA): Circular DNA molecule found in mitochondria.
Inheritance Pattern: Maternally inherited, meaning it is passed from mothers to all their offspring.
Diseases: Examples include Leber’s hereditary optic neuropathy (LHON) and mitochondrial myopathy.
Slide 4: Chloroplast Inheritance
Chloroplasts: Organelles responsible for photosynthesis in plants.
Chloroplast DNA (cpDNA): Circular DNA molecule found in chloroplasts.
Inheritance Pattern: Often maternally inherited in most plants, but can vary in some species.
Examples: Variegation in plants, where leaf color patterns are determined by chloroplast DNA.
Slide 5: Plasmid Inheritance
Plasmids: Small, circular DNA molecules found in bacteria and some eukaryotes.
Features: Can carry antibiotic resistance genes and can be transferred between cells through processes like conjugation.
Significance: Important in biotechnology for gene cloning and genetic engineering.
Slide 6: Mechanisms of Extrachromosomal Inheritance
Non-Mendelian Patterns: Do not follow Mendel’s laws of inheritance.
Cytoplasmic Segregation: During cell division, organelles like mitochondria and chloroplasts are randomly distributed to daughter cells.
Heteroplasmy: Presence of more than one type of organellar genome within a cell, leading to variation in expression.
Slide 7: Examples of Extrachromosomal Inheritance
Four O’clock Plant (Mirabilis jalapa): Shows variegated leaves due to different cpDNA in leaf cells.
Petite Mutants in Yeast: Result from mutations in mitochondrial DNA affecting respiration.
Slide 8: Importance of Extrachromosomal Inheritance
Evolution: Provides insight into the evolution of eukaryotic cells.
Medicine: Understanding mitochondrial inheritance helps in diagnosing and treating mitochondrial diseases.
Agriculture: Chloroplast inheritance can be used in plant breeding and genetic modification.
Slide 9: Recent Research and Advances
Gene Editing: Techniques like CRISPR-Cas9 are being used to edit mitochondrial and chloroplast DNA.
Therapies: Development of mitochondrial replacement therapy (MRT) for preventing mitochondrial diseases.
Slide 10: Conclusion
Summary: Extrachromosomal inheritance involves the transmission of genetic material outside the nucleus and plays a crucial role in genetics, medicine, and biotechnology.
Future Directions: Continued research and technological advancements hold promise for new treatments and applications.
Slide 11: Questions and Discussion
Invite Audience: Open the floor for any questions or further discussion on the topic.
This pdf is about the Schizophrenia.
For more details visit on YouTube; @SELF-EXPLANATORY;
https://www.youtube.com/channel/UCAiarMZDNhe1A3Rnpr_WkzA/videos
Thanks...!
THE IMPORTANCE OF MARTIAN ATMOSPHERE SAMPLE RETURN.Sérgio Sacani
The return of a sample of near-surface atmosphere from Mars would facilitate answers to several first-order science questions surrounding the formation and evolution of the planet. One of the important aspects of terrestrial planet formation in general is the role that primary atmospheres played in influencing the chemistry and structure of the planets and their antecedents. Studies of the martian atmosphere can be used to investigate the role of a primary atmosphere in its history. Atmosphere samples would also inform our understanding of the near-surface chemistry of the planet, and ultimately the prospects for life. High-precision isotopic analyses of constituent gases are needed to address these questions, requiring that the analyses are made on returned samples rather than in situ.
Comparing Evolved Extractive Text Summary Scores of Bidirectional Encoder Rep...University of Maribor
Slides from:
11th International Conference on Electrical, Electronics and Computer Engineering (IcETRAN), Niš, 3-6 June 2024
Track: Artificial Intelligence
https://www.etran.rs/2024/en/home-english/
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The ambient solar wind that flls the heliosphere originates from multiple
sources in the solar corona and is highly structured. It is often described
as high-speed, relatively homogeneous, plasma streams from coronal
holes and slow-speed, highly variable, streams whose source regions are
under debate. A key goal of ESA/NASA’s Solar Orbiter mission is to identify
solar wind sources and understand what drives the complexity seen in the
heliosphere. By combining magnetic feld modelling and spectroscopic
techniques with high-resolution observations and measurements, we show
that the solar wind variability detected in situ by Solar Orbiter in March
2022 is driven by spatio-temporal changes in the magnetic connectivity to
multiple sources in the solar atmosphere. The magnetic feld footpoints
connected to the spacecraft moved from the boundaries of a coronal hole
to one active region (12961) and then across to another region (12957). This
is refected in the in situ measurements, which show the transition from fast
to highly Alfvénic then to slow solar wind that is disrupted by the arrival of
a coronal mass ejection. Our results describe solar wind variability at 0.5 au
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Unveiling the Energy Potential of Marshmallow Deposits.pdf
Hermite integrators and 2-parameter subgroup of Riordan group
1. Hermite integrators and 2-parameter subgroup of
Riordan group
Keigo Nitadori
keigo@riken.jp
RIKEN Advanced Institute for Computational Science
July 13, 2016
2. Abstract
A general form for the family of 2-step Hermite integrators
Up to p-th order derivative of the force is calculated directly to
obtain 2(p + 1)-th order accuracy
Now, a simple and general form for the predictor is available
The mathematics was slightly simplified and generalized from the
last talk (99% of the proof was invented by Satoko Yamamoto)
3. Upper triangular Pascal matrix
This following upper triangular Pascal matrix appearers frequently in
this story:
(1) Upas ij
=
j
i
, U−1
pas ij
= (−1)i+j j
i
.
A (p + 1) × (p + 1) sized one looks like,
(2) Upas =
0
0
1
0
2
0 · · · p
0
0 1
1
2
1 · · · p
1
0 0 2
2 · · · p
2
...
...
...
...
...
0 0 0 · · · p
p
.
4. Polynomial shift
A vector of scaled force
(3) F(t) =
f (t)
h f (1) (t)
h2 f (2) (t)/2!
...
hn f (p) (t)/n!
,
where f (n) (t) = dn
dtn f (t) (0 ≤ n ≤ p), obeys a transformation
F(t + h) =
0
0
1
0
2
0 · · · p
0
0 1
1
2
1 · · · p
1
0 0 2
2 · · · p
2
...
...
...
...
...
0 0 0 · · · p
p
F(t) = UpasF(t).(4)
6. Generalization
We modify the upper triangular Pascal matrix with 2-parameter (a, b),
as in
(7) [M(a,b)]ij =
aj + b
i
.
This is no longer an upper triangular matrix.
Our interest is to find the solutions
M−1
(2,0) for the even order terms, and
M−1
(2,1) for the odd order terms.
Unfortunately, explicit forms of their inverses seem to be hardly
available.
7. Matrix inverse (conjecture)
It turned out that, by multiplying (inverse) Pascal matrices, we can
write
(8) M−1
(a,b) = U−1
pas M(1/a,−b/a) U−1
pas,
or equivalently,
(9) M(a,b)U−1
pas
−1
= M(1/a,−b/a)U−1
pas.
Thus, if we define
(10) L(a,b) = M(a,b)U−1
pas,
then
L−1
(a,b) =L(1/a,−b/a),(11)
M−1
(a,b) =U−1
pasL(1/a,−b/a).(12)
8. Interpretation
A 2-parameter dense matrix M(a,b) can be factorized into
(13) M(a,b) = L(a,b)Upas
and we will soon see that L(a,b) is upper triangular.
Though explicit matrix elements of L(a,b) in general are hard to obtain
(see (3.150) GouldBK.pdf, Sprugnoli, 2006), all we need are
M−1
(2,0) =U−1
pasL(1/2,0),(14)
M−1
(2,1) =U−1
pasL(1/2,−1/2).(15)
Fortunately, matrix elements of U−1
pas, L(1/2,0), and L(1/2,−1/2) are
available explicitly.
11. L(a,b): 2-parameter lower-triangular matrix
We compute the matrix element from its definition:
[L(a,b)]ij = M(a,b)U−1
pas ij
(18)
=
∞
k=0
ak + b
i
(−1)k+j j
k
=
∞
k=0
[yi
](1 + y)ak+b
· [tk
](−1 + t)j
=
∞
k=0
[tk
](−1 + t)j
· [yi
](1 + y)b
(1 + y)a k
=[ti
](1 + t)b
−1 + (1 + t)a j
= R (1 + t)b
, −1 + (1 + t)a
ij
.
R(d(t), h(t)) is a Riordan array of which element is [ti]d(t)h(t)j.
12. Composition and convolution
To remove the summation on k, we used a relation
∞
k=0
[tk
] f (t) · [yn
]h(y)g(y)k
=
∞
m=0
∞
k=0
[tk
] f (t) · [yn−m
]hmg(y)k
(19)
=
∞
m=0
hm[tn−m
] f (g(t))
=
∞
m=0
[ym
]h(y) · [tn−m
] f (g(t))
=[tn
]h(t) f (g(t))
with f (t) = (−1 + t)j, g(y) = (1 + y)a, and h(t) = (1 + t)b.
13. Riordan array
is an infinitesimal lower triangle matrix, taking 2 formal power series.
The element at the n-th row and the k-th column is
(20) R d(t), h(t)
nk
= [tn
]d(t)h(t)k
.
Matrix multiplication is given by
R d(t), h(t) ◦ R f (t), g(t) = R d(t) · f h(t) , g h(t) .(21)
For our 2-parameter matrices
L(a,b) =R (1 + t)b
, −1 + (1 + t)a
,
L(c,d) =R (1 + t)d
, −1 + (1 + t)c
,
we have a multiplication
L(a,b) L(c,d) = R (1 + t)b
(1 + t)ad
, −1 + (1 + t)ac
= L(ac,ad+b).
(22)
14. Group structure
L(a,b) forms a subgroup of the Riordan group when a 0.
Multiplication:
L(a,b) L(c,d) = L(ac,ad+b).
Identity:
L(1,0) L(a,b) = L(a,b) L(1,0) = L(a,b)
Inverse:
L−1
(a,b) = L(1/a,−b/a).
The following 2 × 2 matrix preserves the same structure.
(23)
1 0
b a
1 0
d c
=
1 0
ad + b ac
.
15. Application to the Hermite integrators
Remember:
M−1
(2,0) =U−1
pasL−1
(2,0) = U−1
pasL(1/2,0),(24)
M−1
(2,1) =U−1
pasL−1
(2,1) = U−1
pasL(1/2,−1/2).(25)
All we need is the matrices elements of U−1
pas, L(1/2,0), and L(1/2,−1/2).
The first one is very simple: [U−1
pas]ij = (−1)i+j j
i .
19. Matrix element of L(1/2, 0)
We use Lagrange inverse formula with w(t) = −1 +
√
1 + t. For
t = w(w + 2), φ(t) = 1/(2 + t) satisfies w = tφ(w).
[L1/2, 0]nk =[tn
] −1 + (1 + t)1/2 k
(29)
= [tn
]wk
=
k
n
[tn−1
]tk−1
φ(t)n
=
k
n
[tn−k
](2 + t)−n
= 2k−2n k
n
−n
n − k
= (−1)n+k
2k−2n k
n
2n − k − 1
n − k
.
In case n = 0, it is δk0.
20. Matrix element of L(1/2, −1/2)
Similarly,
[L1/2, −1/2]nk =[tn
](1 + t)−1/2
−1 + (1 + t)1/2 k
(30)
= [tn
]
wk
1 + w
= [tn
]
tk
1 + t
φ(t)n−1
φ(t) − tφ (t)
= [tn
]
tk
1 + t
1
(2 + t)n−1
2(1 + t)
(2 + t)2
= 2[tn−k
](2 + t)−n−1
= 2k−2n −n − 1
n − k
= (−1)n+k
2k−2n 2n − k
n − k
.
21. Review
We have concerned with a 2-parameter matrix
(31) [M(a,b)]ij =
aj + b
i
,
which has an LU factorized form
(32) M(a,b) = L(a,b)Upas
where Upas = M(1,0) is an upper triangle Pascal matrix and L(a,b) is a
lower triangle matrix expressed in a Riordan array form
(33) L(a,b) = R (1 + t)b
, −1 + (1 + t)a
.
Matrix inverse M−1
(a,b) is available in
(34) M−1
(a,b) = U−1
pasL−1
(a,b) = U−1
pasL(1/a,−b/a) = U−1
pas M(1/a,−b/a) U−1
pas,
22. Summary
We have generalized the 2-step Hermite integrators
Predictor and corrector
General and explicit matrix elements
Simple and economical formulation, easy to implement
Mathematical combinatorics have performed an essential role for
the derivation and proof
Formal power series, Lagrange inverse formula, Riordan array
Implementers only need to know about matrix vector
multiplications and binomial coefficients, not the full mathematics