A simple proof of polar decomposition in pseudo-Euclidean geometry
We give a simple direct proof of the polar decomposition for separated linear maps in pseudo-Euclidean geometry.
What living mathematicians?
My statement is "tangent" to the discussion of applied mathematics. I refer to the opinion of the prof. Bialynicki-Birula (2014) about the importance of teaching mathematics. I hope to learn from you about the teaching of higher mathematics non-mathematicians in your university. I see this on a big threat to the maintenance of the level and scope of mathematical research in Poland.
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