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Top Questions
29
votes
Why does Wolfram Alpha say the roots of a cubic involve square roots of negative numbers, when all three roots are real?
roots
math-software
asked Oct 31, 2016 at 20:39
math.stackexchange.com
27
votes
An integral for the New Year 2016
calculus
integration
definite-integrals
asked Dec 31, 2015 at 18:40
math.stackexchange.com
17
votes
An ancient Japanese geometry problem: Three circles of equal radius inscribed in an isosceles triangle.
geometry
sangaku
asked Apr 14, 2015 at 21:58
math.stackexchange.com
7
votes
About the decimal period of $\frac 17$
elementary-number-theory
asked Dec 17, 2015 at 15:46
math.stackexchange.com
6
votes
A big "smallest" number
elementary-number-theory
asked Apr 13, 2015 at 16:10
math.stackexchange.com
6
votes
Orthocenter of a triangle collinear with two points in the circumcircle.
geometry
proof-writing
euclidean-geometry
triangles
circles
asked Nov 10, 2022 at 22:08
math.stackexchange.com
5
votes
Finding integer solutions to $y^2=x^3+7x+9$ using WolframAlpha
numerical-methods
diophantine-equations
elliptic-curves
computer-algebra-systems
asked Dec 19, 2015 at 0:31
math.stackexchange.com
Top Answers
193
Why can a quadratic equation have only 2 roots?
math.stackexchange.com
52
Finding out the area of a triangle if the coordinates of the three vertices are given
math.stackexchange.com
46
What are some counter-intuitive results in mathematics that involve only finite objects?
math.stackexchange.com
16
What are some conjectures of your own?
math.stackexchange.com
15
Proving $f:\Bbb R\rightarrow \Bbb R$ is onto where $f(x)=\frac{x^3}{x^2+1}$
math.stackexchange.com
14
What other tricks and techniques can I use in integration?
math.stackexchange.com
12
Isolating $y$ in $\sin(xy)=\cos(xy)$
math.stackexchange.com
11
Linear Algebra Versus Functional Analysis
math.stackexchange.com
10
Why is a geometric progression called so?
math.stackexchange.com
10
Why is this trigonometric identity true?
math.stackexchange.com
10
How to find irrational numbers between rationals. (And is my method correct?)
math.stackexchange.com
9
Cardioid in coffee mug?
math.stackexchange.com
9
simplify $\sqrt[3]{5+2\sqrt{13}}+\sqrt[3]{5-2\sqrt{13}}$
math.stackexchange.com
8
How to use prove this $p^4\equiv p\pmod {13}$
math.stackexchange.com
8
Are those two numbers transcendental?
math.stackexchange.com
8
Find the value of $ab+ 2cb+\sqrt3 ac$?
math.stackexchange.com
7
Calculate $\sum_\limits{k=1}^{100}\left \lfloor \sqrt{k}+\frac{1}{k} \right \rfloor$
math.stackexchange.com
7
How many solutions to this Diophantine equation group of Com Quantum Theory? Does it have a general solution method?
math.stackexchange.com
7
Fundamental unit of the quadratic integer ring $\mathbb{Z}[\sqrt{n}]$
math.stackexchange.com
7
Proving Hahn-Banach theorem directly
math.stackexchange.com
7
Norm of element $\alpha$ equal to absolute norm of principal ideal $(\alpha)$
math.stackexchange.com
7
Does the equation $x^2+23y^2=2z^2$ have integer solutions?
math.stackexchange.com
7
Are $\frac{\pi}{e}$ or $\frac{e}{\pi}$ irrational?
math.stackexchange.com
7
The derivation of the Weierstrass elliptic function
math.stackexchange.com
7
Does $\sin n$ have a maximum value for natural number $n$?
math.stackexchange.com
6
On equations $m^2+1=5^n$
math.stackexchange.com
6
Discriminant of an elliptic curve
math.stackexchange.com
6
Area of loop in graph
math.stackexchange.com
6
Awkward roots of a polynomial
math.stackexchange.com
6
Can a pre-calculus student prove this?
math.stackexchange.com
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