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Feb
9
awarded  Notable Question
Jan
29
asked Define the operations for quadratic forms expressed on matrices?
Jan
20
comment Where is the form $f(g(x))g'(x)$?
"entire books published consisting mainly of page after page of worked-out integrals" - Do you mean tables of integrals or books that show how to compute each integral? (Like Edward's Integral Calculus)?
Jan
20
comment Where is the form $f(g(x))g'(x)$?
@AndréNicolas Yes, Nicolas. This is not imediatelly clear from the calculus textbooks. I'm trying to understand it a little better.
Jan
20
asked Where is the form $f(g(x))g'(x)$?
Jan
15
asked What is the cost of factoring polynomials in $\mathbb{R}[x]$?
Jan
15
awarded  Popular Question
Jan
12
asked Book filled with proofs pre-Decartes and post-Decartes?
Jan
12
accepted What's the importance of conics and quadrics in the context of a course of pure mathematics?
Dec
6
asked Is it actually important to translate the conics?
Nov
29
comment Is $-2 h \sin (\theta ) \cos (\theta )\neq -h\sin (2\theta)$?
Oh, sorry. I usually assume I screwed everything up. Now I screwed up by assuming that I always screw thing up. That's a whole different plane of existence!
Nov
29
asked Is $-2 h \sin (\theta ) \cos (\theta )\neq -h\sin (2\theta)$?
Nov
26
asked What's the importance of conics and quadrics in the context of a course of pure mathematics?
Nov
23
revised How did he went from $b_{12}$ to $\tan 2\varphi=\cfrac{2a_{12}}{a_{11}-a_{22}}$?
deleted 2 characters in body
Nov
22
comment Why does this matrix give the derivative of a function?
@nbubis is a Jordan block and f a function matrix ?
Nov
22
accepted How did he went from $b_{12}$ to $\tan 2\varphi=\cfrac{2a_{12}}{a_{11}-a_{22}}$?
Nov
22
asked How did he went from $b_{12}$ to $\tan 2\varphi=\cfrac{2a_{12}}{a_{11}-a_{22}}$?
Nov
21
comment How did mathematicians decide on the axioms of linear algebra
How does your intuition says that $c\langle u,v \rangle=\langle cu,cv\rangle $? Take the vectors $\{(a,b), (c,d)\}$, then: $e (a,b) =(ea, eb) $ and $\langle (ea, eb), (c, d )\rangle = ea\cdot c +eb\cdot d = e (ac + bd) $.
Nov
21
revised On a non-standard approach to the classification of conics?
deleted 1 character in body
Nov
21
asked On a non-standard approach to the classification of conics?