Examples of cc.redberry.core.tensor.TensorNumber

cc.redberry.core.tensor.TensorNumber
This class represents tensors, witch are actually numbers. Redberry allows to manipulate with complex rational numbers. In fact, this class contains only one field - value, witch is, in general, complex rational number. {@code TensorNumber} returns {@link EmptyIndices} instance as its indices, {@link EmptyTensorIterator} instance as its tensor iterator and {@link TensorContent#EMPTY} instance as its tensor content.
Complex value of this tensor is keeping in simplified form, and all common number operations (adding, multiplying etc.) acting on this, are automatically simplifies this. For example, if this equals 2/5 and we multiply this on 10/3, the result for this will be 4/3. For more information see {@code ComplexElement}. @see Tensor @see ComplexElement @author Dmitry Bolotin @author Stanislav Poslavsky

        if (generatedTensors.isEmpty())
            return TensorNumber.createZERO();
        if (generatedTensors.size() == 1)
            return generatedTensors.get(0);
        if (multiplyFactorial) {
            TensorNumber num = new TensorNumber(new ComplexElement(new NumberFraction(1, generatedTensors.size()), RationalElement.ZERO));
            return new Product(num, new Sum(generatedTensors).equivalent());
        } else
            return new Sum(generatedTensors).equivalent();
    }

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        if (tensor.getClass() != getMultiClass())
            return tensor;
        MultiTensor multiTensor = (MultiTensor) tensor;
        TensorIterator it = multiTensor.iterator();
        Tensor current;
        TensorNumber number = null;
        while (it.hasNext()) {
            current = it.next();
            if (current instanceof TensorNumber)
                if (number == null)
                    number = (TensorNumber) current;

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        if (!(tensor instanceof Fraction))
            return tensor;
        Fraction fraction = (Fraction) tensor;
        if (fraction.getNumerator() instanceof TensorNumber
                && fraction.getDenominator() instanceof TensorNumber) {
            TensorNumber num = (TensorNumber) fraction.getNumerator();
            num.divide((TensorNumber) fraction.getDenominator());
            tensor = null;
            return num;
        }
        return tensor;
    }

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        if (tensor instanceof SimpleTensor)
            return new SplitNumber(TensorNumber.createONE(), tensor);
        if (tensor instanceof TensorNumber)
            return new SplitNumber(TensorNumber.createONE(), tensor);
        if (tensor instanceof Product) {
            TensorNumber number = TensorNumber.createONE();
            TensorIterator iterator = tensor.iterator();
            Tensor current;
            while (iterator.hasNext()) {
                current = iterator.next();
                if (current instanceof TensorNumber) {
                    number.multiply((TensorNumber) current);
                    iterator.remove();
                }
            }
            return new SplitNumber(number, tensor.equivalent());
        }

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        try {
            value = (ComplexElement) cc.redberry.core.number.parser.Parser.parse(expression);
        } catch (NumberFormatException e) {
            return null;
        }
        return new TensorNumber(value);
    }

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Related Classes of cc.redberry.core.tensor.TensorNumber

cc.redberry.core.number.ComplexElement

cc.redberry.core.parser.ParserTensorNumber

cc.redberry.transformation.collect.old.CollectScalars

cc.redberry.transformation.numbers.AbstractCollectNumbers

cc.redberry.transformation.numbers.FractionToNumber

cc.redberry.transformation.symmetrize.Symmetrize

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