Carnival of Mathematics 141

Published by Ganit Charcha | Category - Math Events | 2017-01-09 07:02:50

Carnival of We are glad to host the $141$th Carnival of Mathematics in December $2016$ after last months

Mathematics 140 by Tom at Mathematics and Coding . Carnival of Mathematics is a monthly blogging round up that is organised by The Aperiodical



We choose to host $141$th Carnival in December because $22$nd of this month is celebrated as National Mathematics Day of India. Indian legendary Mathematician Srinivasa Ramanujan was born on $22$nd December $1887$. In order to recognize his immense contribution towards Mathematics the Government of India has declared Ramanujan's birthday to be celebrated every year as the National Mathematics Day of India. We choose to host $141$th Carnival in December because $22$nd of this month is celebrated as National Mathematics Day of India. Indian legendary Mathematician Srinivasa Ramanujan was born on $22$nd December $1887$.In order to recognize his immense contribution towards Mathematics the Government of India has declared Ramanujan's birthday to be celebrated every year as the National Mathematics Day of India.

To start with let us first take a look into some interesting facts about number 141.

1. A crazy sequential representation of $141$ written in terms of $1$ to $9$ in increasing as well as

http://arxiv.org/abs/1302.1479 decreasing order (taken from) is as follows $$141 = 1 + 2.3.4 + 5.6 + 7 + 89 = 9 + 87 + 6.5 + 4.3 + 2 + 1$$

2. $141 = 3.47$ is a semiprime ( a natural number that has only two prime factors, not necessarily

distinct) and $A001358(46) =141$, where the description of $A001358$ can be found here

https://oeis.org/A001358 }. Interestingly, prior to this we celebrated $129$th Carnival of Mathematics

and eventually $129$ was also a semi-prime.

We will now move on to the posts that make up this months carnival.

Let's decipher a thousand-year-old magic Mark Dominus shared with us a nice article titled

. His discourse is motivated by a magic square carved at the entrance of Parshvantha Temple at Khajuraho

in Madhya Pradesh, India.

An integral with a couple John Cook shared with us a blog post

lessons which illustrates in context to

computing definite integrals two principles very nicely - (1) keep in mind the distinction between a

definition and a computational technique, and (2) you might not have to do as much work as it seems.

Everything’s Mixed Up. Can You Sort It All James Clare shared with us a blog post

Out? that describes

some beautiful riddles.

Why the Number Line Freaks Me Peter has shared with us the post titled

Out . This is a nice post

which describes different types of computable numbers starting from whole numbers and at the end of it

has talked about non-computable numbers which can not be understood by human mind.

Fusion and sex in protocells & the start of Artem Kaznatcheev has provided us with the link of his post

evolution which in a way justifies that

Theoretical biology is becoming increasingly mathematized. Most exciting is the introduction of tools

from theoretical computer science and the analysis of algorithms. Here these tools, along with broader

themes from computation, are used to analyze if the fusing parts of sex are essential for getting

evolutionary dynamics going. The post combines fundamental biology with some fun math while summarizing,

criticising, and expanding on a recent preprint.

Mathemethics: the dark and desirable 007 side to Lucy Rycroft-Smith has shared with us his blog post

numbers that refutes the argument that

mathematics is useless, and explores some of the thrilling narratives around mathematical, desirable

skills.

Taming, claiming and reframing the beast Lucy Rycroft-Smith has also directed us with another blog post

of mathematics that describes the essence

of what mathematics is very aptly.

Kaleidoscopic Fractals: Folding the Koch MIke Lawler has directed us to a blog post titled

Snowflake that shows that Koch snowflake is good for

generating fractals with folds.

Joel David Hamkins has shared a brilliant post showing There are no nondegenerate regular polygons in

the integer lattice, except for squares

http://jdh.hamkins.org/no-regular-polygons-in-the-hexagonal-lattice/ . A related follow up post as mentioned by him can be found here





A niced eye opener is the post Math myth-busting some of our worst urban planning misconceptions



Who have more sisters: boys or girls? with lots of nice examples. A niced eye opener is the post





Another nice post we would like to make a mention of is Mathematicians bring ocean to life for Disney's 'Moana '



This brings to an end of this edition of Carnival of Mathematics. Next Carnival of Mathematics will be hosted by Manan at a nice puzzle shared to us by the author Rob Eastaway.This seemingly simple question/puzzle was first posed to the author by Hugh Hunt a couple of years ago. The puzzle turns out to have a number of interesting twists - a couple of which haven't been resolved. For example, how does the fact that girls tend to live longer than boys affect the answer? It's not obvious - and might call for a computer simulation.Another nice post we would like to make a mention of isThis brings to an end of this edition of Carnival of Mathematics. Next

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