/sci/ - Science & Math

>>9024082
[math] {\Delta}_{3,2} [/math] is not necessary. The groups given by the [math] {\Delta}_{1,j} [/math]'s suffice. The general linear group is a multiplicative group. It doesn't matter that [math] x_{3,2} [/math] is always [math] 0 [/math] for a matrix in the image of the embedding if you can multiply the 3rd line of one of them through the 2nd column of another and get something there.

Is it clear now?