note
scain
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.
<p>
<b>Minor update</b>: I should more properly have referred to those conditions as <em>boundary</em> 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 <em>initially</em> (at t=0).
<p>
Scott<br>
<small>
Project coordinator of the [http://www.gmod.org/|Generic Model Organism Database Project]
</small>
226444
226444