User Aleksandr Hovhannisyan - Mathematics Stack Exchange

71 votes

14 answers

43k views

What isn't a vector space?

asked Oct 2, 2017 at 13:39

21 votes

5 answers

3k views

How to improve accuracy when solving calculus questions

asked Jun 27, 2016 at 20:15

20 votes

6 answers

37k views

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

asked Oct 19, 2016 at 12:46

6 votes

4 answers

6k views

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

asked May 19, 2018 at 16:50

6 votes

1 answer

8k views

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

asked Feb 9, 2018 at 14:42

5 votes

2 answers

1k views

Combinations: Drawing marbles from a bag

asked Jun 29, 2017 at 22:31

4 votes

1 answer

4k views

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

asked Jul 10, 2017 at 22:21

3 votes

1 answer

512 views

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

asked Jul 3, 2017 at 22:19

3 votes

0 answers

149 views

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

asked Jul 4, 2017 at 18:12

3 votes

1 answer

253 views

Why isn't this relation transitive?

asked Jul 17, 2017 at 17:32

3 votes

2 answers

451 views

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

asked Dec 7, 2016 at 20:07

3 votes

2 answers

7k views

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

asked Jun 13, 2017 at 22:45

3 votes

1 answer

921 views

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

asked Aug 22, 2019 at 14:37

3 votes

1 answer

6k views

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

asked Aug 31, 2019 at 18:33

3 votes

2 answers

235 views

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

asked Sep 7, 2019 at 14:02

3 votes

1 answer

888 views

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

asked Sep 13, 2019 at 23:32

3 votes

2 answers

465 views

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

asked Dec 12, 2019 at 20:45

2 votes

1 answer

2k views

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

asked Sep 5, 2019 at 22:03

2 votes

1 answer

506 views

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

asked Sep 15, 2019 at 20:14

2 votes

1 answer

1k views

Proof: number of bits in the product of two binary numbers.

asked Jun 29, 2018 at 12:50

2 votes

2 answers

354 views

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

asked Aug 3, 2018 at 17:17

2 votes

3 answers

111 views

What substitution would I make to integrate this?

asked Feb 1, 2018 at 14:35

2 votes

0 answers

235 views

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

asked Feb 4, 2018 at 13:13

2 votes

2 answers

4k views

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

asked Feb 5, 2018 at 19:56

2 votes

1 answer

492 views

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

asked Sep 27, 2019 at 22:32

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

asked Jun 22, 2017 at 19:36

2 votes

0 answers

1k views

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

asked Mar 16, 2017 at 13:22

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.

asked Apr 13, 2017 at 14:29

2 votes

1 answer

392 views

Boolean algebra: confusion regarding the distributive law

asked Jun 5, 2017 at 18:58

2 votes

1 answer

293 views

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

asked Jun 5, 2017 at 21:50

Stack Exchange Network

113 Questions

What isn't a vector space?

How to improve accuracy when solving calculus questions

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

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

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

Combinations: Drawing marbles from a bag

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

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

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

Why isn't this relation transitive?

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

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

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

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

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

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

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

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

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

Proof: number of bits in the product of two binary numbers.

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

What substitution would I make to integrate this?

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

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

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

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

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

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

Boolean algebra: confusion regarding the distributive law

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