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Mathematics
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Frank's user avatar
Frank's user avatar
Frank
  • Member for 7 years
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55 Answers

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10 votes

Equality of triangle inequality in complex numbers

7 votes
Accepted

How can I show that circle does not have the same homotopy type as any finite space?

6 votes
Accepted

Why is the set of all function from $X$ to $Y$ denoted $Y^X$?

6 votes

Can every continuous function be continuously ''transformed'' into a differentiable function?

5 votes
Accepted

When can one use the Leibniz rule for integration?

5 votes
Accepted

Definition of determinant

4 votes
Accepted

A torus whose middle is tied in an overhand knot; how many holes does it have?

4 votes
Accepted

Examples of Riemann surfaces such that a given point on the surface does not necessarily determine a unique value of $w$

3 votes
Accepted

If an analytic $f$ is injective on $\partial D$ then $f$ is injective on $D$

3 votes
Accepted

Almost vector bundle with no local trivialization

3 votes

Find the Poincare Dual of a ray in $\mathbb{R}^2-\{0\}$

3 votes

When can functions of a complex variable be integrated 'normally'?

3 votes
Accepted

Show that $f$ admits an analytic primitive

3 votes

On the growth order of an entire function $\sum \frac{z^n}{(n!)^a}$

2 votes
Accepted

Generalized Triangle Inequality

2 votes
Accepted

Why $\epsilon \aleph_0 =\epsilon$?

2 votes
Accepted

Prove $\{a_n\}^r$ is a Cauchy sequence.

2 votes

Homology of real projective space... I'm not satisfied with the argument in hatcher.

2 votes
Accepted

Question on the proof of the First Isomorphism Theorem

2 votes
Accepted

Cellular homology of torus: cellular boundary homomorphism $d_2$ is abelianization of the attaching word.

2 votes
Accepted

Three topologies on the space of sections of a vector bundle

2 votes
Accepted

"Unfolding" a higher genus surface

2 votes
Accepted

$\ell(f)>\int_{a}^{b}||f'(t)||dt$

1 vote
Accepted

Working with differential forms

1 vote
Accepted

Tangent map vs. differential on manifolds

1 vote

Coordinates where connection coefficients vanish at a point

1 vote
Accepted

Annihilator basis after extension of scalars

1 vote

Understanding the meaning of "scalar multiplication" in a ring

1 vote
Accepted

Suppose $T_1, T_2\in L(V,W)$. Prove that if $\text{null }T_1=\text{null }T_2$ then there exists invertible operator $S\in L(W)$ such that $T_1=ST_2$

1 vote

Let A, B, C be three sets. Prove that if $B$ \ $C$ $⊆A^c$ then $A ∩B ���C$ .

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