invariant [in'vεəriənt]

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a. changeless��constant��unvarying

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1. Some problems of quantum mechanics can be solved easily by means of the invariant of differential equation.
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2. We give a property of the invariant subspace, and generalize the theorem 1 in [1] on the base of the property.
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3. To derive a new body of data from a given one, according to specific procedure, often leaving some feature invariant.
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n.
  1. a feature (quantity or property or function) that remains unchanged when a particular transformation
  2. unaffected by a designated operation or transformation
  3. persistent in occurrence and unvarying in nature

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invariant
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invariant point
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module invariant
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abbe invariant
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vortex invariant
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