The difference between Invariable and Invariant
When used as nouns, invariable means something that does not vary, whereas invariant means an invariant quantity, function etc.
When used as adjectives, invariable means not variable, whereas invariant means not varying.
check bellow for the other definitions of Invariable and Invariant
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Invariable as an adjective:
Not variable; unalterable; uniform; always having the same value.
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Invariable as an adjective (math):
Constant.
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Invariable as an adjective (by extension, grammar, of a word, or a grammatical class):
That cannot undergo inflection, conjugation or declension.
Examples:
"The French adjective <u>marron</u> (brown) is invariable: it does not take the usual <u>s</u> in the plural."
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Invariable as a noun:
Something that does not vary; a constant.
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Invariant as an adjective:
not varying; constant
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Invariant as an adjective (mathematics):
Unaffected by a specified operation (especially by a transformation)
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Invariant as an adjective (computing, programming):
Neither covariant nor contravariant.
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Invariant as a noun:
An invariant quantity, function etc.