cc.redberry.core.transformations.expand

Class ExpandUtils

java.lang.Object

cc.redberry.core.transformations.expand.ExpandUtils

public final class ExpandUtils
extends java.lang.Object

Utility static methods.

Since:

1.0

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ExpandUtils.ExpandPairPort This is a safe concurrent port, which expands out product of two sums.

Field Summary

Fields

Modifier and Type	Field and Description
static Transformation	expandIndexlessSubproduct

Constructor Summary

Constructors

Constructor and Description
ExpandUtils()

Method Summary

Modifier and Type	Method and Description
static Tensor	apply(Transformation[] transformations, Tensor tensor)
static Tensor	expandPairOfSums(Sum s1, Sum s2, Tensor[] factors, Transformation[] transformations) Expands out the product of two sums.
static Tensor	expandPairOfSums(Sum s1, Sum s2, Transformation[] transformations) Expands out the product of two sums.
static Tensor	expandPower(Sum argument, int power, int[] forbiddenIndices, Transformation[] transformations)
static Tensor	expandProductOfSums(Product product, Transformation[] transformations)
static Tensor	expandProductOfSums1(java.lang.Iterable<Tensor> tensor, Transformation[] transformations, boolean indexed)
static Tensor	expandSymbolicPower(Sum argument, int power, Transformation[] transformations)
static boolean	isExpandablePower(Tensor t)
static Tensor	multiplySumElementsOnFactor(Sum sum, Tensor factor, Transformation[] transformations)
static Tensor	multiplySumElementsOnFactorAndExpand(Sum sum, Tensor factor, Transformation[] transformations)
static boolean	sumContainsIndexed(Tensor t)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

expandIndexlessSubproduct

public static final Transformation expandIndexlessSubproduct

Constructor Detail

ExpandUtils

public ExpandUtils()

Method Detail

expandPairOfSums

public static Tensor expandPairOfSums(Sum s1,
                                      Sum s2,
                                      Tensor[] factors,
                                      Transformation[] transformations)

Expands out the product of two sums.

Parameters:

s1 - first sum

s2 - second sum

transformations - additional transformations to be consequently applied on each term in the resulting expression.

factors - if specified, then each resulting term will be multiplied on this factor

Returns:

the resulting expanded tensor

expandPairOfSums

public static Tensor expandPairOfSums(Sum s1,
                                      Sum s2,
                                      Transformation[] transformations)

Expands out the product of two sums.

Parameters:

s1 - first sum

s2 - second sum

transformations - additional transformations to be consequently applied on each term in the resulting expression.

Returns:

the resulting expanded tensor

expandProductOfSums

public static Tensor expandProductOfSums(Product product,
                                         Transformation[] transformations)

apply

public static Tensor apply(Transformation[] transformations,
                           Tensor tensor)

expandProductOfSums1

public static Tensor expandProductOfSums1(java.lang.Iterable<Tensor> tensor,
                                          Transformation[] transformations,
                                          boolean indexed)

multiplySumElementsOnFactorAndExpand

public static Tensor multiplySumElementsOnFactorAndExpand(Sum sum,
                                                          Tensor factor,
                                                          Transformation[] transformations)

multiplySumElementsOnFactor

public static Tensor multiplySumElementsOnFactor(Sum sum,
                                                 Tensor factor,
                                                 Transformation[] transformations)

isExpandablePower

public static boolean isExpandablePower(Tensor t)

sumContainsIndexed

public static boolean sumContainsIndexed(Tensor t)

expandSymbolicPower

public static Tensor expandSymbolicPower(Sum argument,
                                         int power,
                                         Transformation[] transformations)

expandPower

public static Tensor expandPower(Sum argument,
                                 int power,
                                 int[] forbiddenIndices,
                                 Transformation[] transformations)