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	Ratio Test RATS Sequence Ray Rayleigh Differential Equation Rayleigh Distribution Rayleigh-Ritz Variational Technique Rayleigh's Formulas Rayleigh's Theorem Real Analysis Real Axis Real Function Realizer Real Line Real Matrix Real Number Real Part Real Polynomial Real Projective Plane Real Quadratic Field Rearrangement Theorem Reciprocal Reciprocal Difference Reciprocal Polyhedron Reciprocating Sphere Reciprocation

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