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Wednesday, November 17, 2010

shell script

This script read a directory, zip the directory, and create directory.zip file.
And it send the zip file to specific location in my Mac computer using scp.

==========

#!/bin/sh
echo $1
zip -r $1 $1
scp $1.zip albertsk@stokes.eng.hawaii.edu:/Users/albertsk/Desktop/On-going/Presentations/APS-DFD/simulations/

Monday, November 15, 2010

Latex: how to change footnote symbols

Arabic numerals, e.g., 1, 2, 3...
\renewcommand{\thefootnote}{\arabic{footnote}}


Roman numerals (lowercase), e.g., i, ii, iii...\renewcommand{\thefootnote}{\roman{footnote}}



Roman numerals (uppercase), e.g., I, II, III...
\renewcommand{\thefootnote}{\Roman{footnote}}

Alphabetic (lowercase), e.g., a, b, c...

\renewcommand{\thefootnote}{\alph{footnote}}

Alphabetic (uppercase), e.g., A, B, C...

\renewcommand{\thefootnote}{\Alph{footnote}}

A sequence of nine symbols (try it and see!)

\renewcommand{\thefootnote}{\fnsymbol{footnote}}

LaTex: Long arrow



If 


\longrightarrow

is not sufficiently long, try


\[ \xrightarrow{\hspace*{3cm}} \]

Saturday, November 13, 2010

PDF to Keynote (pdftokeynote)

For people who enjoys LaTex presentation, beamer, this free software "pdftokeynote"provides an excellent link between pdf and keynote.  A pdf presentation is prepared using beamer with full functionality of math typesetting. Once the final pdf file is made, then pdftokeynote can convert the pdf file with a number of slides to a Keynote file. Each Keynote page includes a pdf image of the presentation.  Only slide transition is possible in Keynote.

http://www.cs.hmc.edu/~oneill/freesoftware/pdftokeynote.html

Thursday, June 10, 2010

Eigenvalues of an Inverse Matrix

If lambda is an eigen value of a matrix A, then
1/lambda is an eigen value of the inverse matrix of A.


http://en.wikipedia.org/wiki/Inverse_eigenvalues_theorem

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