Ciro Santilli
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Nabla symbol () | 🗖 nosplit | ↑ parent "Gradient, Divergence, Curl, and Laplacian" | 62

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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 Greek letters!
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Nabla is one of those: it was completely made up in modern times, and just happens to look like an inverted upper case delta!
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