diff options
Diffstat (limited to 'src/mean.h')
| -rw-r--r-- | src/mean.h | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/src/mean.h b/src/mean.h new file mode 100644 index 0000000..34ec1d3 --- /dev/null +++ b/src/mean.h @@ -0,0 +1,70 @@ +/* +Copyright 2015 Ian Jauslin + +Licensed under the Apache License, Version 2.0 (the "License"); +you may not use this file except in compliance with the License. +You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + +Unless required by applicable law or agreed to in writing, software +distributed under the License is distributed on an "AS IS" BASIS, +WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +See the License for the specific language governing permissions and +limitations under the License. +*/ + +/* +Compute the mean of a monomial or a polynomial +*/ + +#ifndef MEAN_H +#define MEAN_H + +#include "types.h" + +// mean of a monomial +int mean(Int_Array monomial, Polynomial* out, Fields_Table fields, Polynomial_Matrix propagator); + +// compute the mean of a monomial of internal fields (with split + and -) +int mean_internal(Int_Array internal_plus, Int_Array internal_minus, Polynomial* out, Polynomial_Matrix propagator, Fields_Table fields); +// first pairing with a non-vanishing propagator +int init_pairing(int* pairing, int* mask, int n, Polynomial_Matrix propagator, int* indices_plus, int* indices_minus); +// next pairing with a non-vanishing propagator +int next_pairing(int* pairing, int* mask, int n, Polynomial_Matrix propagator, int* indices_plus, int* indices_minus); +// next term in the Wick expansion +int next_wick(int index, int start, int* mask, int n, Polynomial_Matrix propagator, int* indices_plus, int* indices_minus); + +/* +int mean_internal_slow(Int_Array internal_plus, Int_Array internal_minus, Number* outnum, Polynomial_Matrix propagator); +*/ + +// get lists of internal fields from a monomial (separate + and -) +// requires the monomial to be sorted (for the sign to be correct) +int get_internals(Int_Array monomial, Int_Array* internal_plus, Int_Array* internal_minus, Int_Array* others, Fields_Table fields); + +// compute the mean of a monomial containing symbolic expressions +int mean_symbols(Int_Array monomial, Polynomial* output, Fields_Table fields, Polynomial_Matrix propagator, Groups groups, Identities* computed); +// first term in product with no repetitions +int init_prod(int* current_term, Int_Array symbol_list, Fields_Table fields, int power, Int_Array base_monomial); +// next term in product with no repetitions +int next_prod(int* current_term, Int_Array symbol_list, Fields_Table fields, int power, Int_Array base_monomial); +// find the next term in a polynomial that can be multiplied to a given monomial and add it to the monomial +int next_term_norepeat(int start, Polynomial polynomial, Int_Array* monomial, Fields_Table fields); + +// signature of a permutation +int permutation_signature(int* permutation, int n); + +// sort a list of anti-commuting variables +int sort_fermions(int* array, int begin, int end, int* sign); + +// mean while factoring groups out +int mean_groups(Int_Array monomial, Polynomial* output, Fields_Table fields, Polynomial_Matrix propagator, Groups groups, Identities* computed); + +// compute the mean of a polynomial +int polynomial_mean(Polynomial* polynomial, Fields_Table fields, Polynomial_Matrix propagator, Groups groups); +// multithreaded +int polynomial_mean_multithread(Polynomial* polynomial, Fields_Table fields, Polynomial_Matrix propagator, Groups groups, int threads); +// single thread mean +void* polynomial_mean_thread(void* mean_args); +#endif |