<div dir="ltr">Thank you very much</div><div class="gmail_extra"><br><div class="gmail_quote">2018-05-11 16:09 GMT+02:00 Wien2k User <span dir="ltr"><<a href="mailto:wien2k.user@gmail.com" target="_blank">wien2k.user@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Dear Prof. P. BLAHA and WIEN2k users;<div><br></div><div>I want to estimate the effective value of Hubbard term "Ueff=U-J"</div><div><br></div><div>Can the Hund's Exchange parameter (J) be negative? </div><div><br></div><div>Thank you very much.</div></div>
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