HP15c CE: 8x8 equation system

[Divasson]

I was testing the matrix capabilities of the new HP15C Collector's Edition, by trying a 8x8 equation system. This was completely impossible to do with any of the previous releases: they maxxed memory allocable to matrices at 64 - so you could only invert a 8x8 matrix, but not solving a system since you needed the independent values' vector.

I started creating the two matrices, and filling them with random data, in the hope they would not be singular. To do that, I wrote a short program using the USER feature so that it fills cell by cell of both matrices.

There were three matrices: a 8x8, b 8x1, c 8x1 (result matrix)

(used to program in other languages, it is amazing to be able to solve a problem with just 10-12 steps)

Total memory used: 64+8+8= 80 registers. You still have 19 registers left for programs and operation!

Here is the result:

8x8 Equation system solving with the HP15c CE