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Christian Blatter
  • Member for 11 years, 9 months
  • Last seen more than a month ago

180 Earned bounties for 13,175 reputation

6 votes
Accepted
+50

Why is there this recurring pattern in the derivative of $x\cdot e^{-k\cdot x}$?

1 vote
Accepted
+50

Constrained extrema and geometric interpretation of constrained stationary points

0 votes
+100

There is no scalar field f such that $f'(a;y) > 0$ for a fixed a and for ever non-zero vector y

1 vote
Accepted
+50

Show that this function is uniformly continuous on $\mathbb{R}^d$

1 vote
Accepted
+50

Prove that $f(W)$ is the graph of $y_{n+1} = \varphi(y_1,\cdots,y_n)$

3 votes
Accepted
+100

Double integral over odd region

16 votes
+50

An easy pigeonhole principle problem: Please critique my mathematical reasoning.

4 votes
Accepted
+50

Change of variables in differential equation and the order of the arguments

1 vote
+50

Geometry question and Diameter

3 votes
+100

locus of orthocentre of given triangle if $\tan B+\tan C = c$

1 vote
Accepted
+200

Hessian of function in $\mathbb R^2$

3 votes
+75

In what sense does the Laplace Transform give components of a signal in something called the 's-domain'?

3 votes
Accepted
+200

Multivariable taylor polynomial of a transformation

7 votes
Accepted
+50

Evaluate $\int_{0}^{\frac{\pi}{4}}\tan xdx $ using idea of Riemann Sum

1 vote
+50

Prove that some configuration on $99$-gon is im/possible.

4 votes
Accepted
+50

Finding the area enclosed by curve defined by $\arcsin x+\arcsin y=\arcsin(x\sqrt{1-y^2}+y\sqrt{1-x^2})$

2 votes
Accepted
+50

Find the interval of $a$ that makes $x^2e^{ax}-1\gt \ln x$ true.

3 votes
Accepted
+300

Conditions for level sets to be closed curves

2 votes
Accepted
+50

Using cylindrical coordinates, find the volume of the region $D =\{y^2+z^2\le5+x^2,4x^2+y^2+z^2\le25\}$

1 vote
Accepted
+50

Application of consecutive chain rules.

4 votes
Accepted
+25

$f^{(j)}(a) = 0$ except for the last derivative. Under which conditions $a$ can be a minimizer of $f$?

1 vote
+50

Find the range of $a$ such $|f(x)|\le\frac{1}{4},$ $|f(x+2)|\le\frac{1}{4}$ for some $x$.

1 vote
Accepted
+50

Show this inequality with fractional parts.

1 vote
Accepted
+50

Given point and normal vector find the derivative of a function

1 vote
Accepted
+50

Inverse Function Theorem in Immersions.

1 vote
Accepted
+100

Probability of a sequence of events occurring at least once in n trials

0 votes
Accepted
+50

Area of square under a curve.

2 votes
Accepted
+50

Space curve: $\frac{\tau}{\kappa} =$ constant. Then all normal vectors $N(x)$ lie in a plane $A$.

2 votes
Accepted
+100

Hyperbolic substitution in $\int\frac{dx}{\sqrt{x^2-a^2}}$ for $x\le -a$

1 vote
Accepted
+50

Show there is a unique solution

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