\leq, \prec, \preceq, \ll, \subset, \subseteq, \sqsubseteq, \in, \vdash, \smile, \frown, \geq, \succ, \succeq, \gg, \supset, \supseteq, \sqsupseteq, \ni, \dashv, \mid, \parallel, \equiv, \sim, \simeq, \asymp, \approx, \cong, \bowtie, \propto, \models, \doteq, \perp, $