Examples of cc.redberry.core.groups.permutations.Permutation

            currentBuffer = null;
            return r;
        }


        if (searchForPermutations != null) {
            Permutation permutation;
            out:
            while (searchForPermutations.hasNext()) {
                permutation = searchForPermutations.next();
                IndexMappingBuffer tempBuffer = currentBuffer.clone();
                for (int i = 0; i < size; ++i)
                    if (!tempBuffer.tryMap(fromIndices.get(i), toIndices.get(permutation.newIndexOf(i))))
                        continue out;
                tempBuffer.addSign(permutation.antisymmetry());
                return tempBuffer;
            }
            searchForPermutations = null;
            return currentBuffer = null;
        }

            Map<Permutation, Boolean> symmetries = getEpsilonSymmetries(indices.length);


            //symmetries of product, which is contracted with Levi-Civita
            MappingsPort port = IndexMappings.createPort(temp, temp);
            Mapping mapping;
            Permutation sym;


            //check for two symmetric indices of product contracted with two antisymmetric indices of eps
            while ((mapping = port.take()) != null) {
                //symmetry of product indices
                sym = TensorUtils.getSymmetryFromMapping(indices, mapping);
                //if symmetry mixes indices of product, which are not contracted with eps
                if (!checkNonPermutingPositions(sym, nonPermutableArray))
                    continue;
                //bingo!
                if (sym.antisymmetry() != symmetries.get(sym))
                    return Complex.ZERO;
            }


        }

Related Classes of cc.redberry.core.groups.permutations.Permutation

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