Douglas Blumeyer's RTT How-To: Difference between revisions
Cmloegcmluin (talk | contribs) Gaussian elimination → Gauss-Jordan elimination |
Cmloegcmluin (talk | contribs) →null-space: explain wolfram vector issue |
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|{{-44,0,19},{-30,19,0}} | |{{-44,0,19},{-30,19,0}} | ||
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Note that Wolfram's NullSpace[] gives its list of commas as rows, not columns<ref>i.e. we might have expected it to return {{-44,-30},{0,19},{19,0}} instead of {{-44,0,19},{-30,19,0}}. That's why if you look carefully at the Wolfram Language example given earlier, we define our custom nullSpaceBasis function to include a Transpose (it also includes a Reverse, which swaps the order of the commas, to get the lowest prime-limit ones first).</ref>. | |||
Null-space bases can be calculated by specialized math programs and web tools, as linked above. But I think it’s a good idea to work through it by hand at least a couple times, to demystify it and give you a feel for it. | Null-space bases can be calculated by specialized math programs and web tools, as linked above. But I think it’s a good idea to work through it by hand at least a couple times, to demystify it and give you a feel for it. | ||