Dirac delta function identities

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Online resources for proofs of Dirac delta function identities include Wikipedia, which provides a comprehensive overview of its properties and representations. Users suggest that Wikipedia is a reliable starting point for understanding the Dirac delta function. The discussion emphasizes the importance of confirming which representations qualify as Dirac delta functions. Additional resources may be explored for deeper insights, but Wikipedia is highlighted as a useful tool. Overall, the conversation centers on finding credible references for studying Dirac delta function identities.
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hi

deoes anyone know any online resource for proofs of Dirac delta function identities and confirming which representations are indeed DD functions

Thanks a lot.
 
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Thread 'Two equivalent statements of time reversal symmetric Hamiltonian'

Time reversal invariant Hamiltonians must satisfy ##[H,\Theta]=0## where ##\Theta## is time reversal operator. However, in some texts (for example see Many-body Quantum Theory in Condensed Matter Physics an introduction, HENRIK BRUUS and KARSTEN FLENSBERG, Corrected version: 14 January 2016, section 7.1.4) the time reversal invariant condition is introduced as ##H=H^*##. How these two conditions are identical?
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