M e<chr_var letter="s" var="long">∫</chr_var> el premier chem<chr_abbr type="reg" class="dc" expan="in" cert="no">i-hbar</chr_abbr> <chr_abbr type="reg" class="dc" expan="que" cert="no">q-hbar</chr_abbr>l <chr_abbr type="reg" class="sc" expan="tru" cert="no">t-u</chr_abbr>eue. 