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Heidelberg Laurate Forum 2016

October 8, 2016 Leave a comment

I went to the 4th Heidelberg Laureate Forum and it was amazing. I encourage my students to apply and I am sure they will have a wow experience about how mathematics really is. Here is some of my thought about HLF 2016.

1. What an amazing tour, at a wonderful place.
I had an amazing experience, meeting with a lot of laureates, a lot of young and energetic researchers. We discuss a lot of things with one common thing which is mathematics. The meeting place could not have been better and Heidelberg is just perfect.

2. Mathematics meets his little own brother, computer science.
In this event, we did not only talk about math, we also talk about computer science which is so much younger than mathematics.

3.  Frontier between mathematics and computer science is not a fixed boundary, but it is actually an intersection.
Sir Michael Atiyah said this during the workshop. Read many Atiyah quotes here.

4.  Fermat last theorem
We saw the boy who is fascinated by Fermat’s last theorem. He solved it in 1994 and won the Abel’s prize.

5.  Euler proof of infinite prime
I like this proof of infinite prime and he solved it in the eighteenth century.

6. Deep learning perhaps should’t be named deep learning
Noel Sharkey mentioned that machine learning is nothing like learning, instead, it is a statistical parameter optimization.

7. Sometimes when you want to make things tidy, you find a new knowledge. This is what happens in tensor analysis. Vladimir Voevodsky had an idea to help verifying mathematical profs by computers and preserve intimate connection between maths and human intuition. He called this unimath.

8.  Something wrong in computer science education. Leslie Lamport cricitized computer science education as some of computer scientist did not understand the abstraction he made during the talk. He also said “Not every programming languages are as bad as C, but all prevent you from getting to a superior level of abstraction, he proposed Pluscal.”

9. I think Barbara Liskov is the only woman participating as the laureate in this forum. Wondering how many women have won Turing, Abel or Fields medal.

10. The last talk I remember was from Heisuke Hironaka, Fields Medalist in 1970. He gave many advises and one of those are  “Time is expensive, use it well”, ” You learn from your mates more than from your teacher” and” I want to write a book dedicated to my wife ” which was sweet.

I think that is all I can write. I really enjoy my experience in this forum. And now let’s end our journey at Heidelberg castle.

teaserbox_2016_2_hlff-flemming

My first try creating a bash script

January 30, 2016 2 comments

I am a ubuntu user, but sometimes I also use windows, mainly because my computer in the office is using windows. So, I use both ubuntu and windows. Even, my laptop has both windows and ubuntu. I tried to get rid of windows once, and installed wine to use windows application in my ubuntu. But it runs very slowly and it’s killing me and in the end, I came back to reinstall windows. I mainly use ubuntu for my research. The softwares I use for my research are auto, python, dstool, latex, xfig which run smoothly in ubuntu, even though python and latex can also be installed and run smoothly on windows machine. On the other hand, I use windows to do some regular activities such as browsing the internet, watching movies, checking my email, creating an office documents etc. All of which can be done in ubuntu as well. But there are activities that I must use windows, I sometimes need to use matlab and sometimes I like to play a game that only runs in windows. These two things are the main reason I still come back to use windows. Recently, I learn python so I am now trying to less use matlab.

That is just a background and my main point here is about bash scripting. After a few years using ubuntu, I have not created any bash script. Today, finally I learn to create one script. I created a script to automate my boring routine. When I write a paper, I need some illustrations. I mostly use xfig to create some mathematical images and to be able to use \LaTeX in the figure I need to convert it to an eps file. The produced eps file will be then converted to a pdf file as it is perfectly compatible to my pdflatex command. But before that, I need to crop the resulted pdf file in order to remove white space around the image. Suppose the name of my xfig file is spam.fig. I then write a series of command.

figtex2eps spam.fig
ps2pdf spam.eps
pdfcrop spam.pdf

I want to write a script that do all the above automatically. Thus I created the following script.

#!/bin/bash
# Converts a .fig-file (xfig file) to a .eps-file by using a built-in function figtex2eps
# and then convert it to a .pdf file by using a built-in function ps2pdf
# and finally convert it to a cropped pdf file by using a built-in function pdfcrop
#
# ivanky saputra https://ivanky.wordpress.com
#
# credit to :
# $ /home/abel/c/berland/etc/cvsrepository/figtex2eps/prog/figtex2eps $
# $ ps2pdf in ubuntu $
# $ pdfcrop in ubuntu $
echo "We are going to change the following $1.fig to a cropped pdf file"
function quit {
exit
}
if [$1 == ""];
then
    echo "no files given";
    quit
else
    echo "Processing $1.fig............";
    figtex2eps $1.fig
    ps2pdf $1.eps
    pdfcrop $1.pdf
    echo "Done";
fi

As someone has said that it is better to share your code and data openly as we as human are idiots and will make mistakes, please give me any suggestion to improve mine.

LaTeX in my blog

February 21, 2009 13 comments

It might be that I am really outdated. Yesterday, I browsed blogs around the world and found that now we can have LaTeX in our blog. And here I am, trying to figure that out. In the first instance, I just want to write the famous word LaTeX.

I try to write $latex \LaTeX$ and it is now \LaTeX.

A formula can be written in the same way.

\frac{\partial u}{\partial t} + \frac{\partial u}{\partial x} = 0,

while the source code is

$latex \frac{\partial u}{\partial t} + \frac{\partial u}{\partial x} = 0$.

Thanks to Terence Tao’s blog.

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