# All Questions

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### Change of Basis for 2x2 matrix

Suppose I have the matrix basis $\begin{bmatrix}1&0\\0&0\\\end{bmatrix}$ , $\begin{bmatrix}0&1\\0&0\\\end{bmatrix}$ , $\begin{bmatrix}0&0\\1&0\\\end{bmatrix}$, ...
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### I need someone to add a very long list of numbers for me. [on hold]

352 197 193 153 144 142 120 109 107 101 93 92 72 61 52 51 49 47 47 46 46 45 44 43 42 42 41 40 40 39 38 37 37 37 37 37 36 35 34 33 33 33 31 31 29 28 27 27 26 25 24 24 23 22 22 20 19.8 19.8 19.5 19.4 ...
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### COMBINATIONS OF MEASURABLE FUNCTIONS

If f is such that | f | is measurable, does f have to be measurable ? any help would be appreciated . and proof the answer .
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### how to creat a matlab program?

How can I creat a tridiagonal matrix in matlab if the elements of matrix is again a matrix instead of a scalar.n how to solve them using crouts methods.I am new to matlab.
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### numerical solution of drift diffusion equation

0 down vote favorite in this link (in semiconductor physics section) you can see four coupled equations. do you know that finite element method is more accurate for discretization and numerical ...
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### Find the standard matrix of T given T is a linear transformation

$T:\mathbb{R}^2\to \mathbb{R}^2$ first performs a horizontal sheer that transforms $e_2$ into $e_2 + 2e_1$ (leaving $e_1$ unchanged) and then reflects points through the line $x_2 = -x_1.$ I am ...
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### Surprising applications of topology

Today in class we got to see how to use the Brouwer Fixed Point theorem for $D^2$ to prove that a $3 \times 3$ matrix $M$ with positive real entries has an eigenvector with a positive eigenvalue. The ...
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### Logic - Is it safe to state the following?

say that ∀x∃y in all possible integers (negative integers, 0 and positive integers) is x*y = x is it safe to say that ∃y∀x is also true. If not can someone explain why its not true. The way I'm ...
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### how many jelly beans did each girl have at first?

Martha and Mary had $375$ jelly beans in all. After Mary ate $24$ jelly beans and Martha ate $\frac 17$ of her jelly beans, they each had the same number of jelly beans left. How many jelly beans did ...
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### Need Help with this conical container word problem [on hold]

A conical container (r= 7 ft, h = 28 ft) is filled to (h=24 ft) of a liquid weighing 62.4 ft/lb^3. How much work will it take to pump the contents to the rim? r = radius h = height

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