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The uppercase zeta is not used, because it is normally identical to Latin Z. The lower case letter can be used to represent: The Riemann zeta function in mathematics; The damping ratio of an oscillating system in engineering and physics; The rotational quantity of angular jerk in physics; The effective nuclear charge on an electron in quantum ...
the original Riemann Xi function, i.e. Riemann's lower case ξ, as denoted by Edmund Landau and currently; the xi baryon; represents: the original Riemann Xi function; the modified definition of Riemann xi function, as denoted by Edmund Landau; the extent of reaction
The definition of a Greek letter for this list is a character encoded in the Unicode standard that a has script property of "Greek" and the general category of "Letter". An overview of the distribution of Greek letters is given in Greek script in Unicode.
The cursive forms approached the style of lowercase letter forms, with ascenders and descenders, as well as many connecting lines and ligatures between letters. In the ninth and tenth century, uncial book hands were replaced with a new, more compact writing style, with letter forms partly adapted from the earlier cursive. [57]
Xi (/ z aɪ / ZY or /(k) s aɪ / (K)SY; [1] [2] uppercase Ξ, lowercase ξ; Greek: ξι) is the fourteenth letter of the Greek alphabet, representing the voiceless consonant cluster. Its name is pronounced in Modern Greek. In the system of Greek numerals, it has a value of 60. Xi was derived from the Phoenician letter samekh.
The lowercase letter p: The French way of writing this character has a half-way ascender as the vertical extension of the descender, which also does not complete the bowl at the bottom. In early Finnish writing, the curve to the bottom was omitted, thus the resulting letter resembled an n with a descender (like ꞃ).
Diacritics are written above lower-case letters and at the upper left of capital letters. In the case of a digraph, the second vowel takes the diacritics. A breathing diacritic is written to the left of an acute or grave accent but below a circumflex. Accents are written above a diaeresis or between its two dots.
In Unicode 1.0, the character was unified with the unrelated character yogh Ȝ ȝ , which was not correctly added to Unicode until Unicode 3.0. Historically, ezh is derived from Latin z , but yogh is derived from Latin g by way of insular G. The characters look very similar and do not appear alongside each other in any alphabet.