Jan
3
2012

For those of you who doesn’t know Linear Algebra (yet…), the matrix on the blackboard is a reflection matrix, when multiplying with a vector, the matrix will change the sign of the x coordinate, therefor it will create a reflected image of the vector.

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Jan
2
2012

Today in Algebraic structures class we’ve learned about free groups. And learned that (the rationals) is not a free group…

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Nov
15
2011

The following “joke” is in Hebrew because it doesn’t translate as well in English. Sorry.

Thanks to Ori Katz for the general idea.

Does anyone have a proof for that?

no comments | tags: Fun, Math | posted in Math