What is?

Answer: This is the symbol nabla.​ In Mathematics, this symbol has a special m.​.​.​ Long's Digest Top Stories For You What is ▽? Iliya Valchanov, Co-founder of 365datascience-com Updated Fri This is the symbol nabla. In Mathematics, this symbol has a special meaning: gradient. The gradient is the multivariate generalization of the derivative concept. [math]\nabla[/math][math]f(x_1,x_2,...,x_n) = \begin{pmatrix} \frac{df}{dx_1}, & \frac{df}{dx_2}, & ..., & \frac{df}{dx_n} \end{pmatrix} [/math] ... Read More » What is by far the hardest university to get into? William Beeman, Professor and Chair, University of Minnesota Written May 31, 2017 The most difficult college to get into is Deep Springs College in California. They take only a few applicants. Their graduates go on to world leadership. The next most diff... Read More » What are the top 10 movies of 2017? Dimitri B, B.A from York University (2021) Written Thu Logan, easily the most emotional superhero movie I've seen. Dunkirk, wow, Nolan is a genius. War for the planet of the apes, Andy serkis *slow clap*. Thor ragnarok, this movie... Read More » What are some loopholes in life that everyone should know? Curtis Johnson Updated Jun 7, 2017 Dealing with first dates Go for: Scary movies Roller coaster rides... Read More » Which kind of doctors (medical specialty) are best at making quick accurate diagnoses? Ananya Prabhu, M.B.B.S Medicine and Healthcare Written Jan 21 A lady who looked something like this walked into my prof's clinic. He had never seen her before. The moment she entered, the diagnosis was clear to him. Most of us who woul... Read More » What are some good and profitable "unsexy" businesses? Christopher Welsh, 10+yrs advising and defending small size businesses; 7+ running a RIA and funds Written 6h ago One of my favorites is simply lawn care - what many people in the landscape world call "mow, blow, and go." I know VERY few people in my neighborhood that mow their own law... Read More » Is there any evidence that math (or logic) could exist independent of the human mind? Caleb Beers, amateur Vulcan Updated Jan 17 John Bailey made a good point here. Allow me to elaborate, however. This will be a fairly long answer, and it is aimed at brainy people who are not necessarily schooled in p... Read More » Why does plastic surgery go wrong so often and look so strange? Xu Beixi, working towards her Doctor of Medicine degree now. Updated Feb 22, 2016 Agreed that it goes well most of the time, given that millions across the world have had it and we can name no more than a few cases where it goes awry. In fact, 15million ... Read More » Can I get X-rated films on Netflix? Jason Pettus, owner, Chicago Center for Literature and Photography Written Fri Netflix carries no films that legitimately received an "X" rating from the MPAA, nor do they carry what we commonly think of as commercial pornography. There are literally ... Read More » What happens if the anesthesiologist sees that you have a front tooth loose right before surgery? Enoch Brown, studied at University of Hawaii at Manoa Written Jan 13 I once had a patient during my anesthesia training who had a loose front tooth. I was always told that loose teeth should be pulled just after inducing anesthesia so that t... Read More » Read More in Your Feed Follow Quora on: Get the App for iOS and Android This email was sent by Quora (650 Castro Street #450, Mountain View, CA 94041). If you don't want to receive these emails in the future, please unsubscribe.