But I would have appreciated being assisted. I mean, I come from a socialist country.

Statistics: Posted by tagoma — March 9th, 2018, 9:58 pm

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I did it last week with "FIVE years from now" and

hnoey -> honey

Statistics: Posted by Cuchulainn — March 9th, 2018, 4:30 pm

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Merci!

Statistics: Posted by tagoma — March 9th, 2018, 9:42 am

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I was wondering what "\ limits" does, but it seems it puts the limits directly below and above the Sigma rather than to the right

Yes. I find form (1) more compact and is probably less error-prone when proof-reading and mapping to code (just a feeling).

[$]\frac{dU}{dt} = \sum_ {i=1}^n A_i U[$] (3)

Einstein had his own summation notation

[$]\frac{dU}{dt} = A_i U[$] (4)

but I suppose we all can't be Einstein so stick to the long-winded (but 100% unambiguous) version.

Statistics: Posted by Cuchulainn — March 8th, 2018, 9:00 pm

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or even

[$]\frac{\partial U}{\partial t} = \sum\limits_ {i=1}^n A_i U[$] (2)

[$]\frac{dU}{dt} = \sum_ {i=1}^n A_i U[$] (3)

Statistics: Posted by Cuchulainn — March 7th, 2018, 10:45 am

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Statistics: Posted by Cuchulainn — March 2nd, 2018, 5:25 pm

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I am getting a "502 bad gateway" error logging onto wilmott.com from a couple of places. One network at work, and also at home. ( writing this one my phone)

Is this a firewall problem?

Thx!

Statistics: Posted by tw — February 22nd, 2018, 10:12 pm

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Statistics: Posted by Cuchulainn — February 11th, 2018, 12:23 pm

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ppauper wrote:what exactly do you want, a lot of the entries replaced by [$]\cdots[$] or [$]\vdots[$] or [$]\ddots[$]?

The prototypical example is the upper bidiagonal matrix here.

https://www.quantstart.com/articles/Tri ... -Algorithm

in firefox, when you right click on a picture, you can copy the URL

when I right click on the equation on that site, it gives me the tex

[$]\begin{bmatrix}

1 & c^{*}_1 & 0 & 0 & ... & 0 \\

0 & 1 & c^{*}_2 & 0 & ... & 0 \\

0 & 0 & 1 & c^{*}_3 & 0 & 0 \\

. & . & & & & . \\

. & . & & & & . \\

. & . & & & & c^{*}_{k-1} \\

0 & 0 & 0 & 0 & 0 & 1 \\

\end{bmatrix} \begin{bmatrix}

f_1 \\

f_2 \\

f_3 \\

.\\

.\\

.\\

f_k \\

\end{bmatrix} = \begin{bmatrix}

d^{*}_1 \\

d^{*}_2 \\

d^{*}_3 \\

.\\

.\\

.\\

d^{*}_k \\

\end{bmatrix}

[$]

Statistics: Posted by ppauper — February 10th, 2018, 3:41 pm

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what exactly do you want, a lot of the entries replaced by [$]\cdots[$] or [$]\vdots[$] or [$]\ddots[$]?

The prototypical example is the upper bidiagonal matrix here.

https://www.quantstart.com/articles/Tri ... -Algorithm

Statistics: Posted by Cuchulainn — February 10th, 2018, 1:46 pm

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