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mweiss's user avatar
mweiss
  • Member for 10 years, 4 months
  • Last seen this week
  • Ann Arbor, MI
112 votes
Accepted

Why isn't the area of a square always greater than the length of one of its sides?

97 votes
Accepted

What does strength refer to in mathematics?

94 votes

What is $0\div0\cdot0$?

66 votes
Accepted

Does $i^4$ equal $1?$

52 votes
Accepted

A question about differentiating equations that are impossible to solve for a variable

47 votes

Why is Completeness not a Topological Property?

46 votes
Accepted

Why are higher-degree polynomial equations more difficult to solve?

42 votes
Accepted

Arithmetic mean. Why does it work?

38 votes
Accepted

Is there a formula to calculate the area of a trapezoid knowing the length of all its sides?

37 votes

Is there a function that returns the degree of a polynomial?

36 votes
Accepted

Can one deduce whether a given quantity is possible as the area of a triangle when supplied with the length of two of its sides?

33 votes

Why are removable discontinuities even discontinuities at all?

33 votes

What is so wrong with thinking of real numbers as infinite decimals?

27 votes
Accepted

What's so special about a prime ideal?

27 votes

Can a non-zero vector field have zero divergence and zero curl?

26 votes

Why can't we define more elementary functions?

22 votes

Why is the area of a circle not $2 \pi R^2$?

21 votes

Why is the derivative important?

21 votes

Does there exist a right triangle with area 7 and perimeter 12?

20 votes
Accepted

Why is $-145 \mod 63 = 44$?

19 votes

Do matrices really rotate and stretch vectors or is that definition incorrect?

17 votes

Fields that can be ordered in more than one way

17 votes
Accepted

Why does $2+2=5$ in this example?

17 votes
Accepted

How to find the solution of a quadratic equation with complex coefficients?

16 votes
Accepted

How to find the vector formula for the bisector of given two vectors?

16 votes

A very general method for proving inequalities. Too good to be true?

15 votes

Does it make any sense to prove $0.999\ldots=1$?

14 votes

Does a zero eigenvalue mean that the matrix is not invertible regardless of its diagonalizability?

14 votes
Accepted

True or false: If $f(x)$ is continuous on $[0, 2]$ and $f(0)=f(2)$, then there exists a number $c\in [0, 1]$ such that $f(c) = f(c + 1)$.

14 votes

Why is the commutator defined differently for groups and rings?

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