User smcc

10 votes

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When evaluating a limit by making a change of variable, how does the sign (+/-) change?

answered Jul 22, 2016 at 14:18

9 votes

The mean of the of a sum is the sum of the means

answered Jul 25, 2016 at 18:51

7 votes

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Evaluate an infinite product in a closed form $\prod\limits_{n=1}^{\infty} \frac{1}{1+\pi^{1/{2^n}}}$

answered Jul 27, 2016 at 20:37

7 votes

How to intuitively think of this definition

answered Jul 29, 2016 at 12:55

6 votes

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Is there a formal way to show that $X \cap Y \subseteq X$.

answered Jul 24, 2016 at 21:42

5 votes

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Summation over multiple arguments

answered Nov 21, 2018 at 13:32

5 votes

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Where am I going wrong with using the chain rule to compute the derivative of this composite function?

answered Apr 14 at 15:46

5 votes

Why the Lagrangian function is has different sign depending on the book?

answered Aug 11 at 16:25

5 votes

When a matrix is neither negative semidefinite, nor positive semidefinite, nor indefinite? (Only with Real numbers)

answered Aug 22 at 11:39

5 votes

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Interpretation of the ratio of the derivative of a function to the function.

answered Jul 23, 2016 at 14:33

5 votes

If $\lim_{x\to 0}\frac1{x^3}\left(\frac1{\sqrt{1+x}}-\frac{1+ax}{1+bx}\right)=l$, then what is the value of $\frac{1}{a}-\frac{2}{l}+\frac{3}{b}$?

answered Jul 15, 2016 at 16:17

5 votes

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Why does the "iff" wording for a biconditional imply a double implication?

answered Aug 3, 2016 at 22:42

5 votes

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How can I derive an asymptotic expression for the incomplete Beta function?

answered Aug 5, 2016 at 14:09

4 votes

what is the Nash equilibrium in a Third price auction?

answered Nov 21, 2018 at 9:17

4 votes

Find all solutions to $a+b+2c-d=3$

answered Aug 4, 2016 at 12:26

4 votes

Power set notation

answered Jul 28, 2016 at 22:14

4 votes

Removing my averages

answered Jul 15, 2016 at 21:58

4 votes

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Solving for a function

answered Jul 14, 2016 at 18:15

4 votes

A question about the term "depressed cubic"

answered Jul 20, 2016 at 13:05

4 votes

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Explanation: In how many ways can 6 things be divided between 2 people?

answered Jul 24, 2016 at 21:52

4 votes

Partial and total derivative of a multivariable function

answered Jul 22, 2016 at 15:34

4 votes

properties of sums and product of functions

answered Sep 27, 2018 at 15:16

4 votes

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Why is this set determined to be empty?

answered Oct 2, 2018 at 21:17

3 votes

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Inconsistent results in reversing the order of integration

answered Aug 11, 2022 at 14:09

3 votes

confused about published answer to a conditional probability question

answered Oct 6, 2018 at 17:49

3 votes

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$\frac{f(x)}{f(y)}=\frac{f(1−x)}{f(1-y)}$ and I know that $f′(x)<0, f(x)>0 $ $\forall x$, what can I say of $x$ and $y$?

answered Oct 21, 2018 at 19:30

3 votes

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Why is the Euclidian norm convex, if the square root function is concave?

answered Jul 24, 2016 at 13:09

3 votes

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Hessian of a composition of maps

answered Jul 25, 2016 at 15:59

3 votes

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Show that if a function is nonnegative and continuous on [a,b] then f(x)=0 for all x in [a,b]

answered Jul 21, 2016 at 13:07

3 votes

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How to show $ \lim_{(x,y) \to (0,0)} \frac{3x^2y^2}{x^4+y^4}=\frac{3}{2} $ using the $\epsilon$-$\delta$ notation.

answered Jul 21, 2016 at 15:12

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251 Answers

When evaluating a limit by making a change of variable, how does the sign (+/-) change?

The mean of the of a sum is the sum of the means

Evaluate an infinite product in a closed form $\prod\limits_{n=1}^{\infty} \frac{1}{1+\pi^{1/{2^n}}}$

How to intuitively think of this definition

Is there a formal way to show that $X \cap Y \subseteq X$.

Summation over multiple arguments

Where am I going wrong with using the chain rule to compute the derivative of this composite function?

Why the Lagrangian function is has different sign depending on the book?

When a matrix is neither negative semidefinite, nor positive semidefinite, nor indefinite? (Only with Real numbers)

Interpretation of the ratio of the derivative of a function to the function.

If $\lim_{x\to 0}\frac1{x^3}\left(\frac1{\sqrt{1+x}}-\frac{1+ax}{1+bx}\right)=l$, then what is the value of $\frac{1}{a}-\frac{2}{l}+\frac{3}{b}$?

Why does the "iff" wording for a biconditional imply a double implication?

How can I derive an asymptotic expression for the incomplete Beta function?

what is the Nash equilibrium in a Third price auction?

Find all solutions to $a+b+2c-d=3$

Power set notation

Removing my averages

Solving for a function

A question about the term "depressed cubic"

Explanation: In how many ways can 6 things be divided between 2 people?

Partial and total derivative of a multivariable function

properties of sums and product of functions

Why is this set determined to be empty?

Inconsistent results in reversing the order of integration

confused about published answer to a conditional probability question

$\frac{f(x)}{f(y)}=\frac{f(1−x)}{f(1-y)}$ and I know that $f′(x)<0, f(x)>0 $ $\forall x$, what can I say of $x$ and $y$?

Why is the Euclidian norm convex, if the square root function is concave?

Hessian of a composition of maps

Show that if a function is nonnegative and continuous on [a,b] then f(x)=0 for all x in [a,b]

How to show $ \lim_{(x,y) \to (0,0)} \frac{3x^2y^2}{x^4+y^4}=\frac{3}{2} $ using the $\epsilon$-$\delta$ notation.