in reply to What is the difference between a corner case and edge case?

I believe it comes from numerical methods, specifically for solving multidimentional differential equations. In order to solve a 2D differential equation, you need initial conditions at the boundaries; along the sides, you have one condition that must be met. At the corners, you have two conditions that must met, and frequently, that is where the problems happen.

**Minor update**: I should more properly have referred to those conditions as *boundary* conditions, that have to true all the time. In order to solve a 2d differential equation, you also need initial conditions describing the state of the surface *initially* (at t=0).

Scott

Project coordinator of the Generic Model Organism Database Project

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