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ΨCI=c0Ψ0+∑iaciaΨia+∑ijabcijabΨijab+…cap psi sub cap C cap I end-sub equals c sub 0 cap psi sub 0 plus sum over i a of c sub i to the a-th power cap psi sub i to the a-th power plus sum over i j a b of c sub i j end-sub raised to the a b power cap psi sub i j end-sub raised to the a b power plus … : Includes single (S) and double (D) excitations.

Detailed course modules specifically designed for chemistry undergraduates and postgraduates. 4. Quick Study Tips Don't ignore the math: