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blacknapkins7
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2 votes
2 answers
127 views

Proving a Rational Expression is Surjective

2 votes
0 answers
30 views

Cardinality between union of open uncountable set with finite set

2 votes
1 answer
22 views

Given the nth Partial Sum, write a formula for $a_n$

2 votes
3 answers
135 views

Proof that $\sup(c+A) = c + \sup(A)$

2 votes
2 answers
56 views

Is $h(x)=\frac{f(x)}{g(x)}$ injective?

1 vote
0 answers
127 views

Multiplication on the Integers Proof

1 vote
4 answers
88 views

Proof that if a linear map $T$ admits only $x=0$ as solution to $T(x)=0$, then $T$ is injective (one to one)

1 vote
1 answer
85 views

Injective/Surjective function with multiple variables

1 vote
1 answer
63 views

Multi-variable function bijection proof

1 vote
2 answers
107 views

How can I prove that the nth-root of $PQ$, where $P$ and $Q$ are prime, is irrational?

1 vote
1 answer
49 views

Elementary Proof Involving Inequalities

0 votes
1 answer
57 views

Subset of Power Set of Naturals

0 votes
1 answer
71 views

Elementary Divisibility Proof

0 votes
0 answers
64 views

Preparation for Undergraduate Mathematical Thinking

0 votes
1 answer
38 views

Injective/Surjective Multi-variable function

0 votes
1 answer
76 views

A $2$x$2$ Matrix $A$ is invertible if $\det(A) \not= 0$

0 votes
0 answers
35 views

Proving Inequality Operation is Well-Defined

0 votes
1 answer
28 views

Showing Piecewise Function is not Onto

0 votes
1 answer
56 views

Mathematical Induction with Inequality Proof

0 votes
1 answer
57 views

Undetermined Coefficient Particular Form

0 votes
0 answers
69 views

Intermediate Linear Algebra Text

0 votes
0 answers
32 views

Linear Transformation mapping linearly independent vectors onto a linearly dependent set

-1 votes
1 answer
57 views

Help With Atypical Induction Proof [closed]