Del

来自Big Physics
Safin（讨论 | 贡献）2022年4月27日 (三) 04:41的版本 （建立内容为“Category:etymology == google == [https://www.google.com.hk/search?q=del+etymology&newwindow=1&hl=en ref] early 20th century: abbreviation of delta1, from the…”的新页面）
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google

ref

early 20th century: abbreviation of delta1, from the representation of the operator as an inverted capital delta.


Ety img del.png

wiktionary

ref

From delta, the symbol being an inverted delta

See deal

Shortening

Abbreviation of Latin delineavit

取自“https://www.bigphysics.org/index.php?title=Del&oldid=22628”