Jacob Tamarkin
... that an American consul in Riga examined Russian-American mathematician Jacob Tamarkin in analytic geometry in order to verify his identity?
... that an American consul in <a href="./Riga" id="mwBTo" rel="mw:WikiLink" title="Riga">Riga</a> examined <a class="mw-redirect" href="./Russian-American" id="mwBTs" rel="mw:WikiLink" title="Russian-American">Russian-American</a> <a href="./Mathematician" id="mwBTw" rel="mw:WikiLink" title="Mathematician">mathematician</a> <b id="mwBT0"><a href="./Jacob_Tamarkin" id="mwBT4" rel="mw:WikiLink" title="Jacob Tamarkin">Jacob Tamarkin</a></b> in <a href="./Analytic_geometry" id="mwBT8" rel="mw:WikiLink" title="Analytic geometry">analytic geometry</a> in order to verify his identity?