L e<chr_var letter="s" var="long">∫</chr_var> genz <chr_abbr type="reg" class="dc" expan="qui" cert="no">q-vbar</chr_abbr> par le pre e<chr_var letter="s" var="long">∫</chr_var>toi<chr_abbr type="reg" class="dc" expan="en" cert="no">e-hbar</chr_abbr>t. 