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U+2245 ≅ APPROXIMATELY EQUAL TO: Another combination of "≈" and "=", which is used to indicate isomorphism or congruence. U+2246 ≆ APPROXIMATELY BUT NOT ACTUALLY EQUAL TO: U+2247 ≇ NEITHER APPROXIMATELY NOR ACTUALLY EQUAL TO: U+2248 ≈ ALMOST EQUAL TO: U+2249 ≉ NOT ALMOST EQUAL TO: U+224A ≊ ALMOST EQUAL OR EQUAL TO
The less-than sign with the equals sign, <=, may be used for an approximation of the less-than-or-equal-to sign, ≤. ASCII does not have a less-than-or-equal-to sign, but Unicode defines it at code point U+2264. In BASIC, Lisp-family languages, and C-family languages (including Java and C++), operator <= means "less than or equal to".
Musical symbols are marks and symbols in musical notation that indicate various aspects of how a piece of music is to be performed. There are symbols to communicate information about many musical elements, including pitch, duration, dynamics, or articulation of musical notes; tempo, metre, form (e.g., whether sections are repeated), and details about specific playing techniques (e.g., which ...
It represents a specialized cursive type of the letter d, just as the integral sign originates as a specialized type of a long s (first used in print by Leibniz in 1686). Use of the symbol was discontinued by Legendre, but it was taken up again by Carl Gustav Jacob Jacobi in 1841, [ 4 ] whose usage became widely adopted.
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Nu (/ ˈ nj uː /; uppercase Ν, lowercase ν; Greek: vι ni) is the thirteenth letter of the Greek alphabet, representing the voiced alveolar nasal IPA:.In the system of Greek numerals it has a value of 50.
Random variables are usually written in upper case Roman letters, such as or and so on. Random variables, in this context, usually refer to something in words, such as "the height of a subject" for a continuous variable, or "the number of cars in the school car park" for a discrete variable, or "the colour of the next bicycle" for a categorical variable.