Englishfor English speakers
invariance
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noun
the nature of a quantity or property or function that remains unchanged when a given transformation is applied to it
the invariance of the configuration under translation
—
noun
(= invariability)
the quality of being resistant to variation
under
Preposition
—
In the same place as another thing, but lower.
They ate under the trees.
—
In the control of.
He was under the leader of the organization.
—
In the middle of a process; experiencing.
The idea is under the committee's judgement (judging).
permutation
—
noun
act of changing the lineal order of objects in a group
—
noun
complete change in character or condition
the permutations...taking place in the physical world
— Henry Miller
—
noun
the act of changing the arrangement of a given number of elements
—
noun
(= replacement)
an event in which one thing is substituted for another
the replacement of lost blood by a transfusion of donor blood