what does ∇ (upside down triangle) symbol mean in this problem. Ask Question Asked 14 years, 4 months ago.

2021年8月2日 · Inverted delta for representing gradient how to do that? i didnt find a command I know to print using \delta but cant represent gradient.

2018年3月27日 · Strictly speaking, nabla is the name of the typographical glyph, the upside down triangle: just a symbol on paper, meaning whatever the author intends it to mean. The name comes from the glyph's resemblance to an old fashioned harp.

2016年3月28日 · then a package is missing, which provides the symbol. For example, package amssymb provides the symbol: \documentclass{article} \usepackage{amssymb} \begin{document} $\triangledown$ \end{document} If you want to have the nabla symbol, then this symbol is available without additional packages:

2007年11月23日 · Unique symbols identifying safety and regulatory characteristics on components designed by other companies (e.g. Mazda) are equivalent to the inverted delta ( ∇ ) symbol. Examples are the Mazda "A" and "AR" symbols or special fastener base part numbers beginning with "W9" which are to be treated as inverted delta.

2022年6月17日 · Interestingly, if one of these font packages is loaded, the \ce macro will automatically use the upright greek letter -- here, \updelta-- while evaluating the expression \ce{\delta^18O}. I suppose that the slight gap after the upright lowercase-delta symbol helps clarify that we're not dealing "delta raised to the 18th power".

2016年9月3日 · It is called nabla, which is the name of the symbol but not it's meaning.. In Calculus, you can find it (alone) as an operator meaning "denotes the vector of partial derivatives":

2016年7月9日 · $\begingroup$ ok I understand that this represent a sum of partial derivatives in respect to all coordinates $$\Delta f= \sum_{i=1}^n \frac{\partial^2 f}{\partial x_i^2}$$ in the further example (p.9 example 2) the Poisson equation is presented as $$-\Delta u = f(u)$$ where does this minus come from then? $\endgroup$

2016年6月24日 · 234B ⍋ Apl Functional Symbol Delta Stile Since it is an APL character, you can try the package APL from CTAN (it looks like a plain TeX package, but once you have the character, you can adapt it to use with LaTeX as well). Alternatively, you can try to insert it directly from UNicode (given a UNicode font that supports this symbol).

Contradiction symbol "upside-down T" [duplicate] Ask Question Asked 8 years, 8 months ago.