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Storey refers to the number of open or closed stacked counters, especially in the context of the letters a and g and their typographic variants.. The lowercase 'g' has two typographic variants: the single-storey form (with a hook tail) has one closed counter and one open counter (and hence one aperture); the double-storey form (with a loop tail) has two closed counters.
Letter frequency is the number of times letters of the alphabet appear on average in written language. Letter frequency analysis dates back to the Arab mathematician Al-Kindi (c. AD 801–873), who formally developed the method to break ciphers .
Arithmomania (from Greek arithmós, "number", and maníā, "compulsion") is a mental disorder that may be seen as an expression of obsessive–compulsive disorder (OCD). [1] Individuals experiencing this disorder have a strong need to count their actions or objects in their surroundings.
Use of letters (except I, O, Q) with digits in vehicle registration plates of Hong Kong. 34: Using all numbers and all letters except I and O; the smallest base where 1 / 2 terminates and all of 1 / 2 to 1 / 18 have periods of 4 or shorter. 35
The nnnn or hhhh may be any number of digits and may include leading zeros. ... Letters: Uppercase. U+00C0 À 192 0303 0200 À Latin Capital Letter A with grave:
Benjamin Franklin's phonetic alphabet, based on the Latin alphabet, introduced a number of new letters as part of a wider proposal to reform English orthography. Other proposals have gone further, proposing entirely new scripts for written English to replace the Latin alphabet such as the Deseret alphabet and the Shavian alphabet .
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The products n(n − 1) count the number of combinations of n elements taken two at a time. (Actually this counts each pair twice; the extra factors of 2 occur in both numerator and denominator of the formula and thus cancel out.) Each of the n i occurrences of the i-th letter matches each of the remaining n i − 1 occurrences