There is a quaint story in Ripley’s Believe It or Not! 15th Series (1969) about a man who used mathematical terms to propose. Robert Greer, a mathematics teacher at the Mount School in York, England, made the following proposal to a girl named Anne in 1880:
If R = 1/2 and A = 1/2,
Then R + A = 1,
But R – A = nothing at all.
The lucky man received a positive reply from Anne:
Let it be R + A.