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In mechanical engineering, chi is used as a symbol for the reduction factor of relevant buckling loads in the EN 1993, a European Standard for the design of steel structures. In graph theory , a lowercase chi is used to represent a graph's chromatic number .
Early symbols similar to the Chi Rho were the Staurogram and the IX monogram (). In pre-Christian times, the Chi-Rho symbol was also used to mark a particularly valuable or relevant passage in the margin of a page, abbreviating chrēston (good). [3] Some coins of Ptolemy III Euergetes (r. 246–222 BC) were marked with a Chi-Rho. [4]
Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities. In these contexts, the capital letters and the small letters represent distinct and unrelated entities.
Chrismon Chi-Rho symbol with Alpha and Omega on a 4th-century sarcophagus (Vatican Museums) A Christogram (Latin: Monogramma Christi) [a] is a monogram or combination of letters that forms an abbreviation for the name of Jesus Christ, traditionally used as a religious symbol within the Christian Church. One of the oldest Christograms is the Chi ...
Typographical symbols and punctuation marks are marks and symbols used in typography with a variety of purposes such as to help with legibility and accessibility, or to identify special cases. This list gives those most commonly encountered with Latin script. For a far more comprehensive list of symbols and signs, see List of Unicode characters.
The Chi Rho symbol representing Christ. The letter rho overlaid with chi forms the Chi Rho symbol, used to represent Jesus Christ. It was first used by Emperor Constantine the Great. A can be seen on his standard known as the Labarum.
Caduceus, a symbol of commerce, often erroneously used as a symbol of medicine. Camunian rose; Celtic cross; חַי Chai; ΧΡ Chi Rho; Christian symbolism. Christian cross / Christian cross variants; Conch shell; Coptic cross ☽ Crescent; Cross; Cross and Crown; Cross and flame; Cross of Sacrifice; Cross of St. Peter; Crucifix; Crux Gemmata
The Chi Rho is formed by superimposing the first two (capital) letters chi and rho (ΧΡ) of the Greek word "ΧΡΙΣΤΟΣ", meaning Christ, in such a way to produce the monogram. Widespread in ancient Christianity, it was the symbol used by the Roman emperor Constantine I as vexillum (named Labarum).