Convergence test
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.. module:: xc
	    
.. autoclass:: ConvergenceTest
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.. autoclass:: CTestFixedNumIter
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.. autoclass:: ConvergenceTestTol
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.. autoclass:: CTestEnergyIncr
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.. autoclass:: CTestNormDispIncr
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.. autoclass:: CTestNormUnbalance
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.. autoclass:: ConvergenceTestNorm
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.. autoclass:: CTestRelativeEnergyIncr
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.. autoclass:: CTestRelativeNormDispIncr
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.. autoclass:: CTestRelativeNormUnbalance
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.. autoclass:: CTestRelativeTotalNormDispIncr
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