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Prikvačeni tweet
My
#Einstein paper is posted on#arXiv. (It resulted from my#Math-#Physics Symposium talk.) https://arxiv.org/abs/1608.05752 pic.twitter.com/DSXe9No59f
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Is there a continuous Fibonacci function? The old Fibonacci sequence adds previous two terms. A continuous version might be integrating previous unit interval, so F(x) = ∫ F(t) dt from t = x-1 to t = x. Show that there is a (non-trivial) smooth such function. Is it unique?
#mathHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
It was asked if there's an anti-Fibonacci sequence where each term is the sum of the two terms that follow it. Thus, x(n) = x(n+1) + x(n+2). Since this can be written x(n+2) = x(n) - x(n+1), we have a normal recursion. E.g. 1, 2, -1, 3, -4, 7, -11, 18, ... etc.
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Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi
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Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi
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Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi
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Who are you rooting for this
#SuperBowl
? @49ers@Chiefs#SuperBowlLIV#SuperBowlSundayHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Today is
#SuperBowlSunday, the@49ers and the@Chiefs, which I'll be watching. It's also good news from the#groundhog on#GroundhogDay.#HappySundayHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi
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Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi
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Let u(x,y) be a harmonic real function on a domain D in R². If u² is also harmonic, then u is constant on D.
#math#calculus#complexanalysis#FunFridayHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
The integer power usually appearing in De Moivre's Formula can be replaced by any complex number as long as we understand we're working with the "principal power" (as described here).
#math#calculus#complexanalysispic.twitter.com/bN47tKSzRr
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Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi
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The trace of operators on Hilbert space, when defined, is independent of which orthonormal basis one picks (so is an invariant). Here, this is stated for "positive" operators T*T where T* is the analogue of the conjugate-transpose for matrices.
#math#algebra#calculuspic.twitter.com/eh6LkNLHcx
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Assume there is differentiable F such that F(F(x)) = cos x. Taking derivative of this gives F'(F(x)) F'(x) = -sin x. Evaluating this at the unique number c such that cos(c) = c gives F'(F(c)) F'(c) = -sin c < 0. But F(c) = c, so this says F'(c)^2 < 0, contradiction. qed
Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Eigenvectors are a useful tool in describing the structure of Hermitian (or, more generally, normal) matrices in terms of their similarity with diagonal matrices. The structure of all matrices, however, requires we consider generalized eigenvectors and eigenspaces.
#math#algebrapic.twitter.com/TZZsSx5AeX
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The word "computation" has greater illusory powers than the word "calculation."
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Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi
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One of my private rules in writing papers is: help the reader, and don't be a smart-arse. You are writing to communicate, not show off.
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Who said the appendix is useless? I like adding them to the end of my papers to help out.
#mathHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
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Čini se da učitavanje traje već neko vrijeme.
Twitter je možda preopterećen ili ima kratkotrajnih poteškoća u radu. Pokušajte ponovno ili potražite dodatne informacije u odjeljku Status Twittera.
Math prof at U. Northern B.C. Acting Chair of the Mathematics & Statistics Dept (since March 2016). Presbyterian Christian.