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Aleksandr Hovhannisyan's user avatar
Aleksandr Hovhannisyan's user avatar
Aleksandr Hovhannisyan's user avatar
Aleksandr Hovhannisyan
  • Member for 8 years, 6 months
  • Last seen more than a month ago
71 votes
14 answers
43k views

What isn't a vector space?

21 votes
5 answers
3k views

How to improve accuracy when solving calculus questions

20 votes
6 answers
37k views

Why won't a series converge if the limit of the sequence is 0?

6 votes
4 answers
6k views

Boolean algebra: why does the distributive property not make intuitive mathematical sense?

6 votes
1 answer
8k views

Where do the values in a z-table come from?

5 votes
2 answers
1k views

Combinations: Drawing marbles from a bag

4 votes
1 answer
4k views

Solution verification: picking $5$-card hands from standard deck of $52$, with conditions

3 votes
1 answer
512 views

How many 8-bit strings don't have 6 consecutive 0s?

3 votes
0 answers
149 views

Solution verification: number of solutions to the equation $x_1 + x_2 + x_3 + x_4 + x_5 + x_6 = 25$

3 votes
1 answer
247 views

Why isn't this relation transitive?

3 votes
2 answers
450 views

Evaluate $\int_{\pi/4}^{\pi/2} \frac{3+5cot(x)}{5-3cot(x)}$

3 votes
2 answers
7k views

Prove that if $x^3 - x > 0$, then $x > -1$

3 votes
1 answer
891 views

Why is a Maclaurin series the function itself for a polynomial $f(x)$?

3 votes
1 answer
6k views

Floating-point systems: Is the mantissa the whole thing or just the "fraction" part after the decimal?

3 votes
2 answers
234 views

Catastrophic cancellation problem: what is the relative error of this computation?

3 votes
2 answers
448 views

Why is $0.09 + 0.01$ not exactly representable as $0.1$ in floating-point systems but $0.085 + 0.015$ is?

2 votes
1 answer
2k views

Machine epsilon: why is $(1 + \epsilon) + \epsilon = 1$?

2 votes
1 answer
489 views

Superposition principle and affine functions: why does it hold only if $\alpha + \beta = 1$ in $f(\alpha \vec{x} + \beta \vec{y})$?

2 votes
1 answer
878 views

Simple vector word problem: a $100$-dimensional vector $x$, where $x_i$ denotes the number of $i-1$-year-olds in a population

2 votes
1 answer
486 views

Computer science FLOPs question (complexity): We have $100$ vectors, each with $10^5$ elements.

2 votes
2 answers
348 views

What is the relationship between modulo and $\log_2$ in this problem?

2 votes
3 answers
108 views

What substitution would I make to integrate this?

2 votes
0 answers
234 views

Determine whether $X$ and $Y$ are statistically independent.

2 votes
2 answers
4k views

Piecewise integration: find the 75th percentile of this continuous random variable.

2 votes
2 answers
98 views

Prove that $f : \mathbb{Z} \times \mathbb{Z} \to \mathbb{Z}$ defined as $f(m, n) = 2n - 4m$ is not injective

2 votes
0 answers
1k views

Converting $(-5, 5, 5)$ from rectangular to cylindrical coordinates.

2 votes
2 answers
1k views

Applying stokes' theorem to evaluate the double integral for the hemisphere with radius 2 for $y \geq 0$ and oriented in the $+y$ direction.

2 votes
1 answer
390 views

Boolean algebra: confusion regarding the distributive law

2 votes
1 answer
288 views

Understanding the mathematical intuition/logic behind the "easy" solution to this loop algorithm problem.

2 votes
1 answer
6k views

Multivariable second derivative test: what if $f_{xx}(a, b) = 0$?