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+====== BraketDiagonal ======
+###
+//BraketDiagonal(psi1List, O, psi2List)// calculates the expectation value or matrix element $\left\langle \psi_1[i] \mid O \mid \psi_2[i] \right\rangle$ for all $i$.
+In Quanty //Braket(psi1, O, psi2)// is the same as // psi1 * O * psi2//. The difference is that the function //Braket// can be faster. //Braket// can work on lists of functions and then returns a matrix or vector with all possible expectation values
+###
+===== Input =====
+  * psi1 or psiList1 : Wavefunction or list of Wavefunctions
+  * O : Operator
+  * psi2 or psiList2 : Wavefunction or list of Wavefunctions
+===== Output =====
+  * real or complex number, or a list of these or a matrix of these
+===== Example =====
+###
+description text
+###
+==== Input ====
+<code Quanty Example.Quanty>
+-- some example code
+</code>
+==== Result ====
+<file Quanty_Output>
+text produced as output
+</file>
+===== Table of contents =====
+{{indexmenu>.#1}}