Stephansen's acute sense for all kinds of hidden symmetries, not easily detected without clever manipulations with complicated quantities and expressions, was unusual, to say the least.
Stephansen ng matinding kahulugan para sa lahat ng uri ng mga nakatagong symmetries, hindi madaling napansin na walang matalino manipulations sa komplikadong at dami expression, ay hindi karaniwan, upang sabihin ang hindi bababa sa.