I'm looking for an introductive book on Modular Forms and their applications to Algebraic Geometry and Algebraic Number Theory. Some Ideas? Explainin...

I'm having trouble with an exercise from Rotman's Homological Algebra. It has to do with what Wikipedia calls "horizontal composition" of natura...

I hope this is an easy one. I need to calculate the new height and width of a scaled rotated rectangle. I know all its corners $(A, B, C, D)$, its rotatio...

"The aim of this puzzle is to free the tied cord from the figure-eight metal loop, without breaking or untying the cord."

I was looking at the definition of Big Omega: \begin{align} \Omega(g(n)) &= \{ f(n): \text{ there exist positive constants }c \text{ and }n_0 \\ &...

$AB=5,0;\; AC=3,0\;$and $BC=4,0$. What is the height?

I'm slightly confused on the subject of conjugates and how to define them. I know that for a complex number $ a - bi $ the conjugate is $ a + bi $ an...

The question is about binary multiplication for negative numbers. Assume we want to multiply -5 * -3 so the result is +15. 1) In the first step, we have t...

Requirements: A) not too thick, as I am reading this only to solve calculus problem. B) free on web is the best (optional) C) I don't mind if the boo...

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