Package cc.redberry.core.combinatorics

Examples of cc.redberry.core.combinatorics.IntPermutationsGenerator

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        public StretchPairSource(final OutputPortUnsafe<? extends IndexMappingBuffer> opu,
                final Tensor[] from, final Tensor[] to) {
            super(opu);
            this.from = from;
            this.to = to;
            this.permutationGenerator = new IntPermutationsGenerator(from.length);
        }
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            }
        return true;
    }

    private boolean comparePermutationAlgorythm(TensorSortedContent arr1, TensorSortedContent arr2, int from, int size) {
        IntPermutationsGenerator enumerator = new IntPermutationsGenerator(size);
        int[] permutation;
        OUTFOR:
        while (enumerator.hasNext()) {
            permutation = enumerator.next();
            for (int i = 0; i < size; ++i)
                if (!compare(arr1.get(i + from), arr2.get(permutation[i] + from)))
                    continue OUTFOR;
            return true;
        }
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        Indices indices = IndicesFactory.create(tensor.getIndices().getFree());
        int[] indicesArray = indices.getAllIndices().copy();
        Symmetries symmetries = TensorUtils.getIndicesSymmetriesForIndicesWithSameStates(indicesArray, tensor);
        int lowerCount = indices.getLower().length(), upperCount = indices.getUpper().length();

        IntPermutationsGenerator lowIndicesPermutationsGenerator,
                upperIndicesPermutationGenerator;
        SumBuilder sumBuilder = new SumBuilder();
        Tensor summand;
        List<int[]> generatedPermutations = new ArrayList<>();
        if (upperCount != 0 && lowerCount != 0) {
            lowIndicesPermutationsGenerator = new IntPermutationsGenerator(lowerCount);
            while (lowIndicesPermutationsGenerator.hasNext()) {
                int[] lowerPermutation = lowIndicesPermutationsGenerator.next().clone();
                for (int i = 0; i < lowerCount; ++i)
                    lowerPermutation[i] = lowerPermutation[i] + upperCount;
                upperIndicesPermutationGenerator = new IntPermutationsGenerator(upperCount);
                UPPER:
                while (upperIndicesPermutationGenerator.hasNext()) {
                    int[] upperPermutation = upperIndicesPermutationGenerator.next();
                    summand = permute(tensor, indicesArray, upperPermutation, lowerPermutation, generatedPermutations, symmetries);
                    if (summand != null)
                        sumBuilder.put(summand);
                }
            }
        } else if (upperCount == 0) {
            lowIndicesPermutationsGenerator = new IntPermutationsGenerator(lowerCount);
            while (lowIndicesPermutationsGenerator.hasNext()) {
                int[] lowerPermutation = lowIndicesPermutationsGenerator.next();
                summand = permute(tensor, indicesArray, new int[0], lowerPermutation, generatedPermutations, symmetries);
                if (summand != null)
                    sumBuilder.put(summand);
            }
        } else if (lowerCount == 0) {
            upperIndicesPermutationGenerator = new IntPermutationsGenerator(upperCount);
            while (upperIndicesPermutationGenerator.hasNext()) {
                int[] upperPermutation = upperIndicesPermutationGenerator.next();
                summand = permute(tensor, indicesArray, upperPermutation, new int[0], generatedPermutations, symmetries);
                if (summand != null)
                    sumBuilder.put(summand);
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        public StretchPairSource(final MappingsPort opu,
                                 final Tensor[] from, final Tensor[] to) {
            super(opu);
            this.from = from;
            this.to = to;
            this.permutationGenerator = new IntPermutationsGenerator(from.length);
        }
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    PermutatorProvider(final MappingsPort opu,
                       final Tensor[] from, final Tensor[] to) {
        super(opu);
        this.from = from;
        this.to = to;
        generator = new IntPermutationsGenerator(from.length);
    }
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                    return false;
        OUTER:
        for (Stretch stretch : precalculatedStretches)
            if (stretch.length > 1) {
                SEMIOUTER:
                for (int[] permutation : new IntPermutationsGenerator(stretch.length)) {
                    for (i = 0; i < stretch.length; ++i)
                        if (!mappingExists(from[stretch.from + i], to[stretch.from + permutation[i]]))
                            continue SEMIOUTER; // This permutation is bad
                    continue OUTER; //Good permutation has been found
                }
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    PermutatorProvider(final MappingsPort opu,
            final Tensor[] from, final Tensor[] to) {
        super(opu);
        this.from = from;
        this.to = to;
        generator = new IntPermutationsGenerator(from.length);
    }
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                    return false;
        OUTER:
        for (Stretch stretch : precalculatedStretches)
            if (stretch.length > 1) {
                SEMIOUTER:
                for (int[] permutation : new IntPermutationsGenerator(stretch.length)) {
                    for (i = 0; i < stretch.length; ++i)
                        if (!mappingExists(from[stretch.from + i], to[stretch.from + permutation[i]]))
                            continue SEMIOUTER; // This permutation is bad
                    continue OUTER; //Good permutation has been found
                }
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        public StretchPairSource(final MappingsPort opu,
                                 final Tensor[] from, final Tensor[] to) {
            super(opu);
            this.from = from;
            this.to = to;
            this.permutationGenerator = new IntPermutationsGenerator(from.length);
        }
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        Indices indices = IndicesFactory.create(tensor.getIndices().getFree());
        int[] indicesArray = indices.getAllIndices().copy();
        List<Permutation> symmetries = TensorUtils.getIndicesSymmetriesForIndicesWithSameStates(indicesArray, tensor);
        int lowerCount = indices.getLower().length(), upperCount = indices.getUpper().length();

        IntPermutationsGenerator lowIndicesPermutationsGenerator,
                upperIndicesPermutationGenerator;
        SumBuilder sumBuilder = new SumBuilder();
        Tensor summand;
        List<int[]> generatedPermutations = new ArrayList<>();
        if (upperCount != 0 && lowerCount != 0) {
            lowIndicesPermutationsGenerator = new IntPermutationsGenerator(lowerCount);
            while (lowIndicesPermutationsGenerator.hasNext()) {
                int[] lowerPermutation = lowIndicesPermutationsGenerator.next().clone();
                for (int i = 0; i < lowerCount; ++i)
                    lowerPermutation[i] = lowerPermutation[i] + upperCount;
                upperIndicesPermutationGenerator = new IntPermutationsGenerator(upperCount);
                UPPER:
                while (upperIndicesPermutationGenerator.hasNext()) {
                    int[] upperPermutation = upperIndicesPermutationGenerator.next();
                    summand = permute(tensor, indicesArray, upperPermutation, lowerPermutation, generatedPermutations, symmetries);
                    if (summand != null)
                        sumBuilder.put(summand);
                }
            }
        } else if (upperCount == 0) {
            lowIndicesPermutationsGenerator = new IntPermutationsGenerator(lowerCount);
            while (lowIndicesPermutationsGenerator.hasNext()) {
                int[] lowerPermutation = lowIndicesPermutationsGenerator.next();
                summand = permute(tensor, indicesArray, new int[0], lowerPermutation, generatedPermutations, symmetries);
                if (summand != null)
                    sumBuilder.put(summand);
            }
        } else if (lowerCount == 0) {
            upperIndicesPermutationGenerator = new IntPermutationsGenerator(upperCount);
            while (upperIndicesPermutationGenerator.hasNext()) {
                int[] upperPermutation = upperIndicesPermutationGenerator.next();
                summand = permute(tensor, indicesArray, upperPermutation, new int[0], generatedPermutations, symmetries);
                if (summand != null)
                    sumBuilder.put(summand);
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Related Classes of cc.redberry.core.combinatorics.IntPermutationsGenerator

  • cc.redberry.core.indexmapping.PermutatorProvider
  • cc.redberry.core.indexmapping.ProviderIntegralFactory
  • cc.redberry.core.indexmapping.ProviderProduct
  • cc.redberry.core.indexmapping.ProviderProductAndDerivative
  • cc.redberry.core.indexmapping.ProviderSum$StretchPairSource
  • cc.redberry.core.tensor.testing.TestEqualsContent
  • cc.redberry.core.transformations.symmetrization.SymmetrizeUpperLowerIndicesTransformation
  • cc.redberry.tensorgenerator.IndexMappingPermutationsGenerator
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