A function of two variables is bilinear if it is linear with respect to each of its variables. The simplest example is .
Bilinear Function
See also
Bilinear Basis, Linear Function, Symmetric Bilinear FormExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Bilinear Function." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/BilinearFunction.html