For Upper Case Xi (Ξ)
* "Cascade Particles" in particle physics * "no change of state" in Z Notation. For Lower Case Xi (ξ)
* Extent of Reaction (Chemical Engineering) * Unchanging vectors * a parameter in a generalized Pareto distribution; * the symmetric function equation of the Riemann zeta function in mathematics, also known as the Riemann Xi function; * the damping factor in an RLC circuit; * a universal set in the set theory; * a number used in the error term of Newton-Cotes formulas that falls between a and b; * one of the two different polypeptide chains of the human embryonic hemoglobin types Hb-Portland (ξ2γ2) and Hb-Gower I (ξ2ε2); * the correlation function in astronomy; * frequency; * a small displacement in MHD plasma stability theory. (From Wikipedia)
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Do you mean 13-11-1985? Then in today's notation it is: XIII-XI-MCMLXXXV
Constantine XI was born on February 8, 1405.
The Roman numeral for 11 is XI.
Constantine XI Dragases, the last Byzantine emperor, ruled from 1449 to 1453.Constantine XI Dragases, the last Byzantine emperor, ruled from 1449 to 1453.Constantine XI Dragases, the last Byzantine emperor, ruled from 1449 to 1453.Constantine XI Dragases, the last Byzantine emperor, ruled from 1449 to 1453.Constantine XI Dragases, the last Byzantine emperor, ruled from 1449 to 1453.Constantine XI Dragases, the last Byzantine emperor, ruled from 1449 to 1453.Constantine XI Dragases, the last Byzantine emperor, ruled from 1449 to 1453.Constantine XI Dragases, the last Byzantine emperor, ruled from 1449 to 1453.Constantine XI Dragases, the last Byzantine emperor, ruled from 1449 to 1453.
now is Xi Jinping