▁center ▁through ▁the ▁University ▁of ▁L eth bridge , ▁in ▁which ▁L eth bridge ▁mathematics ▁education ▁students ▁would ▁t utor ▁middle - school ▁parents ▁on ▁the ▁mathematics ▁their ▁children ▁were ▁learning , ▁and ▁provide ▁educational ▁activities ▁for ▁the ▁parents ▁to ▁do ▁with ▁their ▁children . ▁The ▁program ▁was ▁successful , ▁and ▁has ▁continued ▁in ▁subsequent ▁years . ▁ ▁Other ▁contributions ▁Morris ' s ▁results ▁in ▁groups , ▁graphs , ▁and ▁the ▁symmet ries ▁of ▁groups ▁and ▁graphs ▁include ▁a ▁proof ▁of ▁To ida ' s ▁conject ure ▁according ▁to ▁which , ▁for ▁certain ▁circul ant ▁graphs ▁( the ▁C ay ley ▁graphs ▁of ▁finite ▁cy clic ▁groups ), ▁every ▁symmetry ▁of ▁the ▁graph ▁comes ▁from ▁a ▁symmetry ▁of ▁the ▁underlying ▁group . ▁According ▁to ▁To ida ' s ▁conject ure , ▁this ▁equivalence ▁between ▁group ▁and ▁graph ▁symmet ries ▁should ▁be ▁valid ▁when ▁all ▁of ▁the ▁members ▁of ▁the ▁generating ▁set ▁of ▁the ▁group ▁used ▁to ▁construct ▁the ▁graph ▁are ▁individually ▁gener ators ▁of ▁the ▁group . ▁▁ ▁Morris ▁has ▁written ▁two ▁open ▁text books ▁in ▁mathematics ▁for ▁the ▁under grad uate ▁students ▁at ▁L eth bridge . ▁They ▁are : ▁Proof s ▁and ▁Con cept s : ▁the ▁fund ament als ▁of ▁abstract ▁mathematics ▁( with ▁Dave ▁W itte ▁Morris , ▁ 2 0 1 3 ) ▁Com bin ator ics : ▁an ▁upper - level ▁intro duct ory ▁course ▁in ▁enumer ation , ▁graph ▁theory , ▁and ▁design ▁theory ▁( 2 0 1 7 ) ▁ ▁References ▁ ▁External ▁links ▁Home