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| bio | website | linkedin.com/in/gt6989b |
|---|---|---|
| location | New York, NY | |
| age | 34 | |
| visits | member for | 1 year, 8 months |
| seen | yesterday | |
| stats | profile views | 159 |
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Feb 21 |
answered | Proof involving different distributions in a discrete time Markov chain |
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Feb 21 |
comment |
What's next in this number series? clever. didn't thnk of it. |
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Feb 21 |
comment |
What's next in this number series? Not sure. The last one is roughly $1000\pi$, the one before is roughly $1000e$, and the second is double the first, that's all I can see... |
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Feb 21 |
answered | Formula for $x^k$ in $((x^2 - 1)/x)^{100}$ |
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Feb 21 |
revised |
Formula for $x^k$ in $((x^2 - 1)/x)^{100}$ LaTeX edits |
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Feb 21 |
suggested | suggested edit on Formula for $x^k$ in $((x^2 - 1)/x)^{100}$ |
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Feb 21 |
comment |
What really means when the teacher asks me to iterate on Gauss-Seidel considering a maximum variation of 0.01? @Totty depending on the problem, you may want to use absolute error calculation (as in my answer) or relative error calculation (as you are suggesting, $|1 - x_n/x_{n-1}|$). Both are measures of how far the last step moved away from the previous one. The idea is, when convergence happens, iteration step size decreases... |
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Feb 21 |
answered | What really means when the teacher asks me to iterate on Gauss-Seidel considering a maximum variation of 0.01? |
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Feb 21 |
comment |
Proving existence of limit by Martingale. I like it, a nifty idea, +1. |
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Feb 21 |
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Binary Subtraction of Two Unsigned Integers @RossMillikan he is likely asking how this is actually done on a computer, say in C++ programming -- using 2's complement... See Amzoti's answer below. |
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Feb 20 |
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Binary Subtraction of Two Unsigned Integers Another hint: $X-Y = -(Y-X)$. |
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Feb 20 |
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Binary Subtraction of Two Unsigned Integers What have you tried? Perhaps try to define 01-10 and 10-01 in binary first, and then try to tackle your problem. |
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Feb 20 |
revised |
fixing upper and lower limits LaTeX edits |
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Feb 20 |
suggested | suggested edit on fixing upper and lower limits |
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Feb 20 |
comment |
Working with average numbers and finding unknown variables? For more infor than just the average (see @Twieceler's answer below), you could just solve the system of equations using Gaussian Elimination. |
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Feb 20 |
comment |
Expectation of $X$ given a Cumulative Function Differentiate the CDF $F(x) = 1-x^{-a}$ to get the PDF $f(x)$ and then use $EX = \int_{-\infty}^\infty x f(x) dx$. |
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Feb 20 |
comment |
how to solve the following expectation? closed-form expression or approximation Since $a,b$ are small, could you perhaps round to 3 first terms? Then you need $1 - ma E[b^X] + m(m-1)a^2/2 E[b^{2X}]$... |
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Feb 19 |
comment |
What is the problem in happily using the MacLaurin expansion of $e^x$ with $e^{ix}$? I believe the correct spelling is Maclaurin, not McLaurin... |
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Feb 19 |
comment |
Limit of the geometric sequence Just take for example $r \in \{ -2, -1, -0.5, 0, 0.5, 1, 2 \}$ and play with what happens as $n$ grows. |
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Feb 19 |
revised |
Expectation of the min of two independent random variables? arithmetic |
