At McMaster, Nelson decided to concentrate on mathematics and she registered for the Honours Mathematics course there and performed so well that she even took a graduate course for credit as part of her undergraduate degree.
Sa McMaster, Nelson nagpasiyang pag-isiping sa matematika at siya nakarehistro para sa Honours Mathematics course doon at ginanap upang maayos na siya kahit na kinuha ng isang credit para sa mga nagtapos sa kurso bilang bahagi ng kanyang undergraduate degree.