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| author | Julian Weigt <juw@posteo.de> | 2026-02-09 22:31:37 +0100 |
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| committer | Julian Weigt <juw@posteo.de> | 2026-02-09 22:34:48 +0100 |
| commit | e02b151999af3e2fdc74d302173000f562930cb6 (patch) | |
| tree | 0d98b26eb98bca14f44e8a8258a3c797dfedced8 /README.md | |
| parent | 98399651862197ddf0f8215460ca91c8592c761f (diff) | |
Write some instructions.
Diffstat (limited to 'README.md')
| -rw-r--r-- | README.md | 10 |
1 files changed, 9 insertions, 1 deletions
@@ -20,6 +20,14 @@ builds three files: - `charf_error` does computations using floating point (`double`) numbers and gives an upper bound for the total rounding error. - `charf_exact` does exact computations using fractions. Nominator and denominator are of type `unsigned long long` and bounded in size accordingly. +# Computation + +By default, the program goes through all possible characteristic functions on circles from length 2 to 36, considers derivatives from order 0 to 64 and exponents p = 1,2,4,8,∞. +Computing the maximal function of a function is the most computationally complex part. This means it is time efficient to consider several orders of derivative and exponents at the same time, in particular since the (k+1)th derivative is computed using the kth derivative. + +The program continuously outputs whenever it finds a function that beats the last record for the largest ratio of the L<sup>p</sup> norm of the kth derivative of the maximal function and the function. +It is also possible to print the results in human readable format and as a latex table. + # Correctness -I am relatively confident that the error bounds are correct for all operations except exponentiation, which is not used for p∈{1,∞}. +I am relatively confident that the computed error bounds are correct for all operations except exponentiation, which is not used for p∈{1,∞}. |
