Compiler toolchain Updated 2025-07-16
Binutils Updated 2025-07-16
Automatic programming Updated 2025-11-30
The ultimate high level of which is of course to program with:which is basically the goal of artificial general intelligence, especially according to The Employment Test definition of AGI.
The term has not always had that sense:sums it up.
automatic programming has always been a euphemism for programming in a higher-level language than was then available to the programmer
Decompiler Updated 2025-07-16
GNU Compiler Collection Updated 2025-07-16
Reproducible builds Updated 2025-07-16
Reproducible builds allow anyone to verify that a binary large object contains what it claims to contain!
Source-to-source compiler Updated 2025-07-16
Competitive programming website Updated 2025-10-14
SpaceX Updated 2025-07-16
Group of Lie type Updated 2025-07-16
In the classification of finite simple groups, groups of Lie type are a set of infinite families of simple lie groups. These are the other infinite families besides te cyclic groups and alternating groups.
A decent list at: en.wikipedia.org/wiki/List_of_finite_simple_groups, en.wikipedia.org/wiki/Group_of_Lie_type is just too unclear. The groups of Lie type can be subdivided into:
- Chevalley groups
- TODO the rest
The first in this family discovered were a subset of the Chevalley groups by Galois: , so it might be a good first one to try and understand what it looks like.
TODO understand intuitively why they are called of Lie type. Their names , seem to correspond to the members of the classification of simple Lie groups which are also named like that.
But they are of course related to Lie groups, and as suggested at Video "Yang-Mills 1 by David Metzler (2011)" part 2, the continuity actually simplifies things.
Sporadic group Updated 2025-07-16
Jordan-Holder Theorem Updated 2025-07-16
Composition series Updated 2025-07-16
Torus Updated 2025-07-16
Möbius strip Updated 2025-07-16
Klein bottle Updated 2025-07-16
Classical limit Updated 2025-07-16
The idea tha taking the limit of the non-classical theories for certain parameters (relativity and quantum mechanics) should lead to the classical theory.
It appears that classical limit is only very strict for relativity. For quantum mechanics it is much more hand-wavy thing. See also: Subtle is the Lord by Abraham Pais (1982) page 55.
Symplectic group Updated 2025-07-16
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.
Non-clade groups are evil Updated 2025-07-16
Blood Updated 2025-07-16
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