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QBobWatson
Interactive Linear Algebra
https://github.com/QBobWatson/ila/blob/89587ee4dac9790b6fdf7d80dfce97d8d8f9d5ce/src/parametric-form.xml#L72 z any real number -> z _is_ any real number
In the very first equation of this section (4.3), following "The paralellepiped determined by n vectors", the vectors themselves are introduced as a set of V_i, but the equation (slightly...
In the section in Interactive Linear Algebra about Least Squares(the ellipse) I believe the RREF calculations is not correct. The textbooko says the RREF form is [[1,0,0,0,0,405/266], [0,1,0,0,0,−89/133], [0,0,1,0,0,201/133], [0,0,0,1,0,−123/266],...
https://github.com/QBobWatson/ila/blob/e182f6e5f0eaa2e1e4781ed0f84e10d22799597c/src/matrix-trans.xml#L748 "If A has n rows, then Ax has m entries." It should be: "If A has m rows, then Ax has m entries."
https://github.com/QBobWatson/ila/blob/e182f6e5f0eaa2e1e4781ed0f84e10d22799597c/src/linindep.xml#L211-L213 Equatiion -> Equation https://github.com/QBobWatson/ila/blob/e182f6e5f0eaa2e1e4781ed0f84e10d22799597c/src/projections.xml#L610-L612 \Nul(A^TA)=0 -> \Nul(A^TA)=\{0\}
https://github.com/QBobWatson/ila/blob/a45ab6beef409ba8d4f8e634b3cd0d1b5cf5cfa1/src/matrix-inv.xml#L766
In **3.5.4 Invertible linear transformations**, several non-linear transformations (e.g. f(x) = x^3) were used to illustrate non-invertible transformations. It seems to me that since they are not linear to begin...
[This line](https://github.com/QBobWatson/ila/blob/master/src/subspaces.xml#L374) reads `... If V is the zero subspace, then it is the span of the empty set...`. Should it read `then it is the span of the zero...