L an . t<chr_abbr type="reg" class="dc" expan="ant" cert="no">at-hbar</chr_abbr> <chr_abbr type="reg" class="dc" expan="que" cert="no">q-hbar</chr_abbr> b<chr_abbr type="reg" class="dc" expan="" cert="no">n-hbar</chr_abbr> le<chr_var letter="s" var="long">∫</chr_var>et 