École Polytechnique internal student wiki Updated +Created
wikix.binets.fr runs an internal MediaWiki instance available to all logged in alumni.
ELF Hello World Tutorial / Specified file formats Updated +Created
The ELF standard specifies multiple file formats:
  • Object files (.o).
    Intermediate step to generating executables and other formats:
    Source code
    
        |
        | Compilation
        |
        v
    
    Object file
    
        |
        | Linking
        |
        v
    
    Executable
    Object files exist to make compilation faster: with make, we only have to recompile the modified source files based on timestamps.
    We have to do the linking step every time, but it is much less expensive.
  • Executable files (no standard Linux extension).
    This is what the Linux kernel can actually run.
  • Shared object files (.so).
    Libraries meant to be loaded when the executable starts running.
  • Core dumps.
    Such files may be generated by the Linux kernel when the program does naughty things, e.g. segfault.
    They exist to help debugging the program.
In this tutorial, we consider only object and executable files.
Ultraviolet Updated +Created
GPU compute library Updated +Created
Infrared Updated +Created
Lindsay Mills Updated +Created
Video 1.
Snowden Opens Up About His Girlfriend
. Source. TODO interviewed by.
Video 2.
"Citizenfour" winning Best Documentary Feature by Oscars (2014)
Source. Lindsay attended.
Radio wave Updated +Created
This is likely the easiest one to produce as the frequencies are lower, which is why it was discovered first. TODO original setup.
Also because it is transparent to brick and glass, (though not metal) it becomes good for telecommunication.
Some notable subranges:
Regression Games Updated +Created
University of Oxford spinout company Updated +Created
Visible spectrum Updated +Created
420 to 680 nm for sure, but larger ranges are observable in laboratory conditions.
Anomalous magnetic dipole moment Updated +Created
Battlecode Updated +Created
Some mechanics:
  • inter agent communication
  • compute power is limited by limiting Java bytecode count execution per bot per cycle
Video 1.
Battlecode Final Tournament 2023
. Source.
Video 2.
Introduction to Battlecode by MIT OpenCourseWare (2014)
Source.
Computer Olympiad Updated +Created
Ah, shame, they are a bit weak.
Davisson-Germer experiment Updated +Created
Figure 1.
Schematic of the Davisson-Germer experiment
. Source.
Euclid's formula generates all Pythagorean triples Updated +Created
Gospel of Matthew Updated +Created
The first chapter of the New Testament.
There are infinitely many Pythagorean triples Updated +Created
Direct consequence of Euclid's formula.
ELF Hello World Tutorial / Dynamic linking sections Updated +Created
This program did not have certain dynamic linking related sections because we linked it minimally with ld.
However, if you compile a C hello world with GCC 8.2:
gcc -o main.out main.c
some other interesting sections would appear.

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