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7 with a line through it is unusual in the US, but not totally unheard of. Z with a line through it is quite common in mathematics in the US (to prevent confus
by pjlegato 11y ago
7 with a line through it is unusual in the US, but not totally unheard of.
Z with a line through it is quite common in mathematics in the US (to prevent confusion with the number 2.) Many people who do a lot of math carry the dash over to Zs in general.