Key (cryptography) by Ciro Santilli 35 Updated +Created
Barn (unit) by Ciro Santilli 35 Updated +Created
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Denial-of-service attack by Ciro Santilli 35 Updated +Created
Security through obscurity by Ciro Santilli 35 Updated +Created
Video 1.
LockPickingLawyer SAINTCON keynote (2021)
Source. SAINTCON is "Utah's Premiere Security Conference".
Noam Chomsky by Ciro Santilli 35 Updated +Created
Raspberry Pi Foundation by Ciro Santilli 35 Updated +Created
Cloud computing by Ciro Santilli 35 Updated +Created
Non-volatile memory by Ciro Santilli 35 Updated +Created
Algorithm by Ciro Santilli 35 Updated +Created
Automatic programming by Ciro Santilli 35 Updated +Created
"automatic programming has always been a euphemism for programming in a higher-level language than was then available to the programmer" sums it up.
The ultimate high level is of course to program with: "computer, make money", which is the goal of artificial general intelligence.
Competitive programming website by Ciro Santilli 35 Updated +Created
Composition series by Ciro Santilli 35 Updated +Created
Symplectic group by Ciro Santilli 35 Updated +Created
Intuition, please? Example? mathoverflow.net/questions/278641/intuition-for-symplectic-groups The key motivation seems to be related to Hamiltonian mechanics. The two arguments of the bilinear form correspond to each set of variables in Hamiltonian mechanics: the generalized positions and generalized momentums, which appear in the same number each.
Seems to be set of matrices that preserve a skew-symmetric bilinear form, which is comparable to the orthogonal group, which preserves a symmetric bilinear form. More precisely, the orthogonal group has:
and its generalization the indefinite orthogonal group has:
where S is symmetric. So for the symplectic group we have matrices Y such as:
where A is antisymmetric. This is explained at: www.ucl.ac.uk/~ucahad0/7302_handout_13.pdf They also explain there that unlike as in the analogous orthogonal group, that definition ends up excluding determinant -1 automatically.
Therefore, just like the special orthogonal group, the symplectic group is also a subgroup of the special linear group.
Bible by Ciro Santilli 35 Updated +Created
Dynamite by Ciro Santilli 35 Updated +Created
4G by Ciro Santilli 35 Updated +Created
Cell membrane by Ciro Santilli 35 Updated +Created

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