rsync command

rsync is far better than cp

rsync -zaPv --delete --dry-run abc\ backup\

(dryrun gives the idea about what will be done without doing it

delete will keep the content same on both side

z compression and decompression

P progress

a arkiv

v used in conjunction with dryrun to see the output of what will be done without doing it) 

find command

 To find abc* in current directory 

find . -iname abc*

To find abc* in /Downloads/ directory 

find /Downloads/ -iname abc*

Find files (f) in current dir and then feed it to grep({}) to see if it contains text with 'abc', and consequently print it.

find . -type f -exec grep "abc" '{}'\; -print

or

find . -type f -print | xargs grep "abc"

Find and delete the files (BE CAREFUL)

find . -iname "abc" -delete

Delete empty directories

find . -empty -type d -delete

find files and mention the size of each,

find Desktop/prova/ -iname "*.pdf" -exec du -hs {} \;

Find multiple files and remove them

find ~/Desktop/Junk/ -type f \( -iname "*.zip" -o -iname "*.jpeg" -o -iname "*.srt" \) -exec rm {} \;

count the files created in the last 1 min

find . -mmin -1 -type f -delete | wc -l

Delete all files created in the last 1 min

find . -mmin -1 -type f -delete

How concentrated can the divisors of a typical integer be?

 On next Thursday,

title: How concentrated can the divisors of a typical integer be?

talk by Dimitris Koukoulopoulos (Université de Montréal), October 15, Thursday, 2020, 14:00 Brazilian local time (GMT -3:00)

Abstract: The Delta function measures the concentration of the sequence of divisors of an integer. Specifically, given an integer $n$, we write $\Delta(n)$ for the maximum over $y$ of the number of divisors of $n$ lying in the dyadic interval $[y,2y]$. It was introduced by Hooley in 1979 because of its connections to various problems in Diophantine equations and approximation. In 1981, Maier and Tenenbaum proved that $\Delta(n)>1$ for almost all integers $n$, thus settling a 1948 conjecture due to Erd\H os. In subsequent work, they proved that $(\log\log n)^{c+o(1)}\le \Delta(n)\le (\log\log n)^{\log2+o(1)}$, where $c=(\log2)/\log(\frac{1-1/\log 27}{1-\log3})\approx 0.33827$ for almost all integers $n$. In addition, they conjectured that $\Delta(n)=(\log\log n)^{c+o(1)}$ for almost all $n$. In this talk, I will present joint work with Ben Green and Kevin Ford that disproves the Maier-Tenenbaum conjecture by replacing the constant $c$ in the lower bound by another constant $c'=0.35332277\dots$ that we believe is optimal. We also prove analogous results about permutations and polynomials over finite fields by reducing all three cases to an archetypal probabilistic model.

zoom link
https://us02web.zoom.us/j/82431288933?pwd=SHplRVNYdjlUSzI5WWdycy9NUjB0QT09

ID: 824 3128 8933
password: coffee

Facets 2020 Mathematics lecture series

 

Venue:	Online
Dates:	12--15 October 2020
Time:	1900--2000 IST

This is the 2020 edition of the institute's outreach program for advanced undergraduate (BSc third year) and postgraduate (MSc) students of mathematics.

However, students in other scientific or engineering disciplines with a background in college level mathematics can also attend.

---

Here you get the more info,

https://www.imsc.res.in/outreach/facets2020/

15th International Young Researchers Workshop on Geometry, Mechanics, and Control

 Dear colleagues,

This is the second announcement for the "15th International Young Researchers Workshop on Geometry, Mechanics, and Control" that will take place on the week of 30th Nov-4th Dec 2020. The event will be held online through Zoom (registration is necessary for the Zoom details).

Our goal is to give a platform to master, PhD, and postdoctoral students in Geometry, Mechanics and Control to network and share their research. We will have talks contributed by the participants (you may propose a title+abstract when registering, up to November 1st), and three great minicourses:

• Infinite-dimensional Geometry: theory and applications (Alice Barbara Tumpach, Université de Lille, France)
• C0 Symplectic Geometry (Lev Buhovski, Tel Aviv University, Israel)
• The Pontryagin maximum principle (María Soledad Aronna, Escola de Matemática Aplicada, Brazil)

For more information, refer to: http://utrechtgeometrycentre.nl/15iyrw/

Feel free to forward this email to anyone that may be interested (particularly young researchers!)

All the best and looking forward to seeing many of you there,

Álvaro del Pino (on behalf of the scientific committee) 

María Soledad Aronna
Assistant Professor at EMAp/FGV, Rio de Janeiro, Brazil
Coordinator of the Undergraduate Program in Applied Mathematics (Coordenadora da Graduação)
https://sites.google.com/view/aronna

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Attachments area

Creating groups in Google Meetings

 Hi Guys,,

Ever wondered about making various groups in GoogleMeets. Google soon would launch this facility to make your dream come true. Further on this could be found here,

https://thenextweb.com/insider/2020/10/09/google-meet-will-let-you-create-breakout-rooms-within-your-video-calls/

Correct exams on you browser.

 If you ever wondered about correcting exam paper on your web browser using graphical tablet, then just download the chrome extension, KAMI

https://chrome.google.com/webstore/detail/kami-extension-pdf-and-do/ecnphlgnajanjnkcmbpancdjoidceilk?hl=pt-BR&authuser=1

Chamath Palihapitiya, Founder and CEO Social Capital, on Money as an Instrument of Change

Damn Good!!!!

 

Panel discussion: 'job opportunities for mathematics students in industry and academia' at VMF2020

 

Annotate Google Slides with Jamboard

Now, is the time for e-learning and hence one would like to leverage all possible things available. So here you are in the right place,

What's so sexy about math? | Cédric Villani

 Must watch,