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  2. GAP (computer algebra system) - Wikipedia

    en.wikipedia.org/wiki/GAP_(computer_algebra_system)

    gap> G:= SmallGroup (8, 1); # Set G to be the 1st group (in GAP catalogue) of order 8. <pc group of size 8 with 3 generators> gap> i:= IsomorphismPermGroup (G); # Find an isomorphism from G to a group of permutations. <action isomorphism> gap> Image (i, G); # Generators for the image of G under i - written as products of disjoint cyclic ...

  3. Vienna Ab initio Simulation Package - Wikipedia

    en.wikipedia.org/wiki/Vienna_Ab_initio...

    The Vienna Ab initio Simulation Package, better known as VASP, is a package written primarily in Fortran for performing ab initio quantum mechanical calculations using either Vanderbilt pseudopotentials, or the projector augmented wave method, and a plane wave basis set. [2]

  4. Parameterized complexity - Wikipedia

    en.wikipedia.org/wiki/Parameterized_complexity

    The W hierarchy is a collection of computational complexity classes. A parameterized problem is in the class W[i], if every instance (,) can be transformed (in fpt-time) to a combinatorial circuit that has weft at most i, such that (,) if and only if there is a satisfying assignment to the inputs that assigns 1 to exactly k inputs.

  5. Hyperparameter optimization - Wikipedia

    en.wikipedia.org/wiki/Hyperparameter_optimization

    In machine learning, hyperparameter optimization [1] or tuning is the problem of choosing a set of optimal hyperparameters for a learning algorithm. A hyperparameter is a parameter whose value is used to control the learning process, which must be configured before the process starts.

  6. Parameterized approximation algorithm - Wikipedia

    en.wikipedia.org/wiki/Parameterized...

    The full potential of parameterized approximation algorithms is utilized when a given optimization problem is shown to admit an α-approximation algorithm running in () time, while in contrast the problem neither has a polynomial-time α-approximation algorithm (under some complexity assumption, e.g., ), nor an FPT algorithm for the given parameter k (i.e., it is at least W[1]-hard).

  7. Espresso heuristic logic minimizer - Wikipedia

    en.wikipedia.org/wiki/Espresso_heuristic_logic...

    Logic Friday is a free Windows program that provides a graphical interface to Espresso, as well as to misII, another module in the Berkeley Octtools package. With Logic Friday users can enter a logic function as a truth table, equation, or gate diagram, minimize the function, and then view the results in both of the other two representations.

  8. XGBoost - Wikipedia

    en.wikipedia.org/wiki/XGBoost

    Note that this is the initialization of the model and therefore we set a constant value for all inputs. So even if in later iterations we use optimization to find new functions, in step 0 we have to find the value, equals for all inputs, that minimizes the loss functions. For m = 1 to M:

  9. Galois/Counter Mode - Wikipedia

    en.wikipedia.org/wiki/Galois/Counter_Mode

    where H = E k (0 128) is the hash key, a string of 128 zero bits encrypted using the block cipher, A is data which is only authenticated (not encrypted), C is the ciphertext, m is the number of 128-bit blocks in A (rounded up), n is the number of 128-bit blocks in C (rounded up), and the variable X i for i = 0, ..., m + n + 1 is defined below. [3]