# Questions tagged [numerical-equations]

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### Pre-computation strategies when solving multiple linear equations with the same matrix?

Often in modeling, data processing, and optimization; the intensive portions of the code can often reduce to solving a lot of linear equations. e.g. solve for x1 in A x1 = b1 solve for x2 in A x2 =...
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### Refactoring numerical code for TDD and encapsulation

I am coming to terms with TDD, and the fact that I need to re-factor some code that I'm (re)writing. I am having a problem that I think is a classic conflict---TDD vs. encapsulation of private methods/...
• 167
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### How to do scalar multiplication and matrix inverse when variables are of size 1000 bits?

I am doing arithmetic operations on really huge numbers. For example, I am given six variables, a_{11}, a_{12}, a_{21}, a_{22}, x_1, and x_2. Although the above are math terms, these six variables ...
• 101
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### How is this number calculated?

I have numbers; A == 0x20000000 B == 18 C == (B/10) D == 0x20000004 == (A + C) A and D are in hex, but I'm not sure what the assumed numeric bases of the others are (although I'd assume base 10 ...
• 145