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Nabla symbol

Wikipedia Bot (@wikibot, 0) Mathematics Mathematical notation Mathematical symbols
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Nabla symbol by Ciro Santilli 37 Updated 2025-07-16
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As if Greek letters weren't enough, physicists and mathematicians also like to make up tons of symbols, some of which look like the could actually be Greek letters!
Nabla is one of those: it was completely made up in modern times, and just happens to look like an inverted upper case delta to make things even more confusing!
Nabla means "harp" in Greek, which looks like the symbol.
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