User YetiMountainButter

YetiMountainButter

Member for 5 years, 8 months
Last seen more than a month ago

San Francisco, CA, United States

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Hobbyist, currently rebuilding a mathematical foundation after undergrad in engineering

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May 2, 2020
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Apr 16

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Jan 14, 2019

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True or false: If the function $f + g$ is continuous and $g$ is continuous, then $f$ is also continuous

Dec 2, 2020

Assume $f:[0,1] \rightarrow \mathbb{R}$ is continuous and that $f(x) \geq 2 \quad \text{ if } 0 \leq x \lt 1$. Show that $f(1) \geq 2$

Dec 16, 2020

Proof clarification - If $ab = 0$ then $a = 0$ or $b =0$

Jan 12, 2019

Show $\varepsilon > 0$ and strictly increasing seq of indices $\{n_k\}$ s.t. $k$, $\vert f(s_{n_k}) - f(t_{n_k}) \vert\ge \varepsilon$

Dec 12, 2020

How to Prove It - Ch2 Sec 2 Exercise 2a

Jan 7, 2019

Clarification on set definitions from How to Prove it (Velleman) Chapter 2.3

Jan 9, 2019

Confusion on Additive Property of Supremum and Infimum - Theorem I.33 Apostol Calculus I

Jan 16, 2019

Beckenbach Introduction to Inequalities Chapter 2: Show $(a+b)/2 \le ( (a^2 + b^2 )/2)^{1/2}$

Jan 31, 2018

Explain this "contradiction" of the proof of $x > 0$ iff $x \in \mathbb{R}^{+}$

Jan 13, 2019

Clarification on Theorem 1.19, Apostol Calculus

Feb 2, 2019