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age 24
visits member for 3 years, 5 months
seen Mar 30 at 5:06

A dropout struggling to finish Harris's AG book.


Mar
30
revised How can I prove that $xy\leq x^2+y^2$?
Removed dickishness
Feb
20
awarded  Popular Question
Nov
21
awarded  Yearling
Nov
16
awarded  Notable Question
Aug
19
comment Rigour in mathematics
@RobertIsrael Suppose there is a proposition, and you can prove that it is impossible to construct a counterexample to it. Is this proposition true?
Aug
17
awarded  Nice Answer
Aug
11
answered Rigour in mathematics
Jul
5
comment How do I find partners for study?
I think Reddit University kind of fits your description.
May
23
revised Properties of Continuous Functions
[Edit removed during grace period]
May
23
answered Properties of Continuous Functions
May
21
comment Can an algebraic structure have indistinguishable elements?
More like indistinguishable points of $\operatorname{Spec}\mathbb{R}[x]$ - kinda.
May
13
comment Rotate a plane along a line in 3d space
@cortical BTW, your link is about affine geometry, which also deals with translations, and it uses projective geometry to represent affine transformations with matrices. Beautiful stuff!
May
13
comment Rotate a plane along a line in 3d space
@cortical You can thank me by upvoting :)
May
12
revised Rotate a plane along a line in 3d space
added 1523 characters in body
May
12
comment Trigonometry - Addition and subtraction theorem
Yes, this is correct. Now, to the other values in the formula!
May
12
comment Trigonometry - Addition and subtraction theorem
I'll stick around.
May
12
comment Trigonometry - Addition and subtraction theorem
Well, maybe you won't need the calculator...
May
12
comment Trigonometry - Addition and subtraction theorem
Yes, that's the right formula! Well, almost right - you've made a mistake transcribing it :) Now plug the numbers in to get $\cos \theta$.
May
12
comment Trigonometry - Addition and subtraction theorem
No, you just lack self-confidence :)
May
12
comment Trigonometry - Addition and subtraction theorem
How do you intend to use Pythagorean identity to compute $\cos \theta$ knowing only $\sin \theta$?