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Prime Mover
  • Member for 6 years, 9 months
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38 votes
11 answers
10k views

Is it meaningful to define the Dirac delta function as infinity at zero?

14 votes
2 answers
2k views

What is the reason for the term "zero dimensional" in the context of topology?

8 votes
2 answers
394 views

Can the definition of "The Long Line" be clarified?

7 votes
4 answers
3k views

What is the difference between "infinite" and "transfinite"?

7 votes
2 answers
233 views

Dudeney's "Puzzles and Curious Problems": 38: The Picnic

7 votes
1 answer
105 views

Reduction formula for $I_n (a, b) := \int \frac {a x + b} {(x^2 + A x + B)^n} \mathrm d x$

6 votes
1 answer
180 views

Which Smirnov is behind the Smirnov topology?

5 votes
2 answers
439 views

What is the motivation behind the definition of the "Neighbourhood Space"?

5 votes
1 answer
93 views

Power Series Expansion for Real Inverse Hyperbolic Sine

4 votes
2 answers
109 views

Reduction formula for $I_{n, k} = \int x^k \left({x^2 + A x + B}\right)^n \ \mathrm d x$

4 votes
1 answer
314 views

General definition of antilexicographic order on arbitrary indexed family of ordered sets

4 votes
1 answer
361 views

Equivalent definitions for the diameter of a hyperbola

4 votes
1 answer
795 views

Precise definition of "well-founded relation"

4 votes
1 answer
236 views

Awkward notation in Bert Mendelson's "Intro to Topology" - supremum of union of difference between functions

4 votes
1 answer
172 views

How do you prove the existence of the addition function without pre-supposing it?

4 votes
2 answers
357 views

What is the significance of the term "separable" in the context of countability properties?

4 votes
1 answer
93 views

What is the reason for an "irreducible" (topological) space to be so called?

4 votes
1 answer
111 views

Inscribing equilateral triangle in square -- mistake in historical work by Abu'l-Wafa Al-Buzjani?

4 votes
1 answer
280 views

What is the currently accepted "correct" definition of a "transcendental function"?

4 votes
2 answers
435 views

Integral $\int \frac1{\sqrt {(a x + b) (p x + q)}}dx$

3 votes
1 answer
253 views

Open Ball in Supremum Space of Continuous Functions on Interval

3 votes
1 answer
65 views

Semilattice whose Subsets are All Closed -- does it have a special name?

3 votes
1 answer
140 views

Why is product of infimum and supremum of a commuting pair of elements in a lattice-ordered group equal to the product of the elements?

3 votes
2 answers
78 views

Indefinite integral $\int \frac {\mathrm d x} {p^2 + q^2 \cosh^2 a x}$

3 votes
1 answer
593 views

How do you prove that a "group presentation" actually specifies a group?

3 votes
1 answer
287 views

Does the structure $\mathbb Z [\sqrt m]$ have a name?

3 votes
2 answers
96 views

Problem in abstract algebra concerning $x \div y := x \cdot y^{-1}$

3 votes
1 answer
73 views

Abstract Algebra - steps along the way from a commutative semigroup with certain properties to a group

3 votes
3 answers
95 views

Anticommutative Operation with Left Cancellative Element is Right Operation -- why?

3 votes
0 answers
40 views

Is continuity over closed interval really needed for L'Hopital?