[Wien] Exchange energy

[Fecher, Gerhard]

As by itself, without any context,  it seems to be rather useless

Hmm, the lower the negative energy the higher its absolute value, seems to be mathematically correct
|-5| > |-4|, isn't it.

Ciao
Gerhard

DEEP THOUGHT in D. Adams; Hitchhikers Guide to the Galaxy:
"I think the problem, to be quite honest with you,
is that you have never actually known what the question is."

====================================
Dr. Gerhard H. Fecher
Institut of Inorganic and Analytical Chemistry
Johannes Gutenberg - University
55099 Mainz
and
Max Planck Institute for Chemical Physics of Solids
01187 Dresden
________________________________________
Von: Wien [wien-bounces at zeus.theochem.tuwien.ac.at] im Auftrag von Alex [alexanderwien2k at gmail.com]
Gesendet: Dienstag, 6. Juni 2017 19:43
An: wien at theochem.tuwien.ac.at
Betreff: [Wien] Exchange energy

Dear all,

Anybody could kindly explain me what below sentence means and how it could be true?

"Any gain in the d-p orbitals bond energy is accompanied by a loss in absolute value of exchange energy."

Thanks,
Alex