## Lec 17. Approximation Methods: Variational Principle, Atomic Units

#### Lec 17. Quantum Principles -- Approximation Methods: Variational Principle, Atomic Units -- Instructor: A.J. Shaka, Ph.D Recorded on February 18, 2014. Index of Topics: 0:55 Symmetry 2:23 Orthogonality 5:53 The Variational Principle 23:17 Atomic Units 31:31 Practice Problem 23 34:25 Notation 37:29 Hydride Anion, Try #1

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