单词	Directional Derivative
释义	Directional Derivative (1) is the rate at which the function changes at in the direction . Let be a Unit Vector in Cartesian Coordinates, so (2) then (3) The directional derivative is often written in the notation (4)
随便看	Chebyshev Polynomial of the First Kind Chebyshev Polynomial of the Second Kind Chebyshev Quadrature Chebyshev-Radau Quadrature Chebyshev's Theorem Chebyshev Sum Inequality Chebyshev-Sylvester Constant Checkerboard Checker-Jumping Problem Checkers Checksum Cheeger's Finiteness Theorem Chefalo Knot Chen's Theorem Chern Class Chern Number Chernoff Face Chess Chessboard Chevalley Groups Chevalley's Theorem Chevron Chi Chi Distribution Chi Inequality

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