X represents the vibrational mode of a thin membrane clamped at the edges governed by the wave equation. In 2004, X had around 1 million users across academia and industry. X is MATLAB. The character X was influenced by men in Jane Austen's novels - aloof and withdrawn. He was saved from the Spanish flu by his adoptive father and they travel together saving people. X lives in Forks, Washington and is in a love triangle. X's father is the richest fictional character. X is Edward Cullen from the Twilight series. Variants of X have long been used as a power source like using prisoners' muscle power. Now X is seen as monitoring health with technology. X is exercise