The document defines an ellipse as the set of all points in a plane where the sum of the distances from two fixed points (the foci) is a constant. It provides the key elements and standard equations of an ellipse including the major and minor axes, eccentricity, foci, directrix, and equations when the major axis is parallel to the x-axis or y-axis. Examples are worked out sketching ellipses from their equations by completing the square to put them in standard form.
A Novel Solution Of Linear CongruencesJeffrey Gold
Proceedings - NCUR IX. (1995), Vol. II, pp. 708-712
Jeffrey F. Gold
Department of Mathematics, Department of Physics
University of Utah
Salt Lake City, Utah 84112
Don H. Tucker
Department of Mathematics
University of Utah
Salt Lake City, Utah 84112
Introduction
Although the solutions of linear congruences have been of interest for a very long time, they still remain somewhat pedagogically di cult. Because of the importance of linear congruences in fields such as public-key cryptosystems, new and innovative approaches are needed both to attract interest and to make them more accessible. While the potential for new ideas used in future research
is difficult to assess, some use may be found here. In this paper, the authors make use of the remodulization method developed in [1] as a vehicle to characterize the conditions under which solutions exist and then determine the solution space. The method is more efficient than those cited in the standard references. This novel approach relates the solution space of cx = a mod b to the Euler totient function for c rather than that of b, which allows one to develop an alternative and somewhat more efficient
approach to the problem of creating enciphering and deciphering keys in public-key cryptosystems.
A Novel Solution Of Linear CongruencesJeffrey Gold
Proceedings - NCUR IX. (1995), Vol. II, pp. 708-712
Jeffrey F. Gold
Department of Mathematics, Department of Physics
University of Utah
Salt Lake City, Utah 84112
Don H. Tucker
Department of Mathematics
University of Utah
Salt Lake City, Utah 84112
Introduction
Although the solutions of linear congruences have been of interest for a very long time, they still remain somewhat pedagogically di cult. Because of the importance of linear congruences in fields such as public-key cryptosystems, new and innovative approaches are needed both to attract interest and to make them more accessible. While the potential for new ideas used in future research
is difficult to assess, some use may be found here. In this paper, the authors make use of the remodulization method developed in [1] as a vehicle to characterize the conditions under which solutions exist and then determine the solution space. The method is more efficient than those cited in the standard references. This novel approach relates the solution space of cx = a mod b to the Euler totient function for c rather than that of b, which allows one to develop an alternative and somewhat more efficient
approach to the problem of creating enciphering and deciphering keys in public-key cryptosystems.
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Created out of a necessity for superior performance in Kaggle competitions, Albumentations has grown to become a widely used tool among data scientists and machine learning practitioners.
This case study covers various aspects, including:
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Metrics: The success indicators such as downloads, daily active users, GitHub stars, and financial contributions.
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Development Practices: Best practices for creating, maintaining, and scaling open-source libraries, including code hygiene, CI/CD, and fast iteration.
Community Building: Strategies for making adoption easy, iterating quickly, and fostering a vibrant, engaged community.
Marketing: Both online and offline marketing tactics, focusing on real, impactful interactions and collaborations.
Mental Health: Maintaining balance and not feeling pressured by user demands.
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Explore more about Albumentations and join the community at:
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Website: https://albumentations.ai/
LinkedIn: https://www.linkedin.com/company/100504475
Twitter: https://x.com/albumentations
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Further emphasis will be placed on the role of AI in developing XSLT, or schemas such as XSD and Schematron. We will address the techniques and strategies adopted to create prompts for generating code, explaining code, or refactoring the code, and the results achieved.
The discussion will extend to how AI can be used to transform XML content. In particular, the focus will be on the use of AI XPath extension functions in XSLT, Schematron, Schematron Quick Fixes, or for XML content refactoring.
The presentation aims to deliver a comprehensive overview of AI usage in XML development, providing attendees with the necessary knowledge to make informed decisions. Whether you’re at the early stages of adopting AI or considering integrating it in advanced XML development, this presentation will cover all levels of expertise.
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A tale of scale & speed: How the US Navy is enabling software delivery from l...
005 ellipse
1. LECTURE UNIT 005
Ellipse
Set of all points in a plane such that the sum of the distances of each from two fixed point is a constant.
The fixed points are called the and the line through them is the
y
.
d d
Directrix
d4
Directrix
d3
a
Minor axis, 2b b
Latus rectum
c c
x
v2 F2 C (h, k) F1 v1
d2 b d1 Where:
F1, F2 = Focus
v1, v2 = Vertex
C = Center
a a
d1 + d2 = 2a
Major axis, 2a
Elements of Ellipse
a2 = b2 + c2
d3 c
Eccentricity, e = = a <1
d4
The eccentricity of a conic is a ratio of its distance from the focus
and from directrix.
a
d= e
2b2
Latus rectum, LR = a
Standard Equations
Where the major axis (M.A.) is parallel to the x-axis
(x - h)2 (y - k)2
+ =1
a2 b2
Where the major axis (M.A.) is parallel to the y-axis
(y - k)2 (x - h)2
+ =1
a2 b2
Note: a>b
Sketch the graph:
(x + 3)2 (y - 1)2
1. + =1
25 9
(y + 5)2 2
2. + (x - 1) = 1
25
(x + 2)2 y2
3. + =1
25 9
x2 y2
4. + =1
16 9
“True teaching is not an accumulation of knowledge; it is an
awakening of consciousness”
2. The equation Ax2 + By2+ Dx + Ey + F = 0 where A, B > 0 is the general equation of the ellipse. To sketch the
graph, reduce the equation to standard form.
(Ax2 + Dx) + (By2 + Ey) = - F
2 2 2 2
A x2 + D x + D 2
( ) + B (y 2
+ E y+ E2 D
) = -F + 4A + E
A 4A B 4B 4B
D2 2
M = -F + + E
4A 4B
2 2
( D
A x + 2A ) +B y+ E
( ) =M
2B
Hence;
2 2
D E
(x + 2A ) + (y + 2B )
=1
M M
A B
Note:
M < 0 no graph (imaginary ellipse)
M = 0 single point
M > 0 graph is an ellipse
D ,- E
c= -( 2A 2B )
5. 4x2 + 9y2 - 16x - 18y - 11 = 0
6. 4x2 + 8y2 - 16x - 16y + 24 = 0
7. 3x2 + 5y2 - 7x - y + 52 = 0
8. 25x2 + 9y2 + 100x + 18y + 16 = 0
9. 4x2 + 3y2 - 12 = 0
Find the equation of the parabola with given conditions.
10. With center at (3, 4), focus at (6, 4) and vertex at (8, 4).
11. With vertices at (-3, 7) and (-3, 3) and a focus at (-3, 6).
12. With center at the origin and passing through (-1, 3) and (2, 1).
“Seek peacefully, you will find”
3. ELLIPSE
Example 1:
(x + 3)2 (y - 1)2
+ =1
25 9
Solution: F F
C(-3, 1)
2 2
a = 25 b =9
a=5 b=3
Major Axis (M.A.) is parallel to the x-axis
C (-3, 1)
Example 8:
25x2 + 9y2 + 100x + 18y + 16 = 0
Solution:
(25x2 + 100x) + (9y2 + 18y) = -16
25(x2 + 4x) + 9(y2 + 2y) = -16
Completing squares;
25(x2 + 4x + 4) + 9(y2 + 2y + 1) = -16 + 100 + 9
25(x + 2)2 + 9(y + 1)2 = 93
(x + 2)2 (y + 1)2 C(-2, -1)
+ =1
3.8 10.3
a2 = 10.3 b2 = 3.8
a = 3.2 b = 1.9
Major Axis (M.A.) is parallel to the y-axis
C (-2, -1)
Example 10:
With center at (3, 4), focus at (6, 4) and vertex at (8, 4).
Solution:
Major Axis (M.A.) is parallel to the x-axis
(x + h)2 (y + k)2
+ =1
a2 b2
|CV1|: 8 - 3 = 5
|CF1|: 6 - 3 = 3
C(3, 4) F1(6, 4) V1(8, 4)
b = a2 - c 2
b = 52 - 32
b=4
Hence;
(x - 3)2 (y - 4)2
+ =1
25 16
“Never believe a word without putting its truth to the test”