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Monday Maths

Mathematics

Chaos Theory – Population Growth exhibiting odd behaviour

23rd January 2023 Going Postal 2363 Comments

Think for a moment about a field, half filled with rabbits. How can we figure out how many fluffy bunnies we’ll have in a year’s time? Let’s start by agreeing to use a population of [more…]

Mathematics

Chaos Theory – A gentle introduction

28th November 2022 Going Postal 1675 Comments

Question: Do snails understand mathematics? Ok here’s an idea. Start with the value 0 and 1 and then apply the following rule. Take the last 2 numbers you have and then add them, to make [more…]

History

Tremors and logs

14th November 2022 GrumpyAngler 2480 Comments

Fracking is once again in the news, once again you will hear of the dire consequences, the disasters and the earthquakes caused by drilling and fracturing the shale underground. It was suggested that the proposed [more…]

Mathematics

Calculators and Reverse Polish Notation

7th November 2022 Going Postal 3723 Comments

At the end of September, Doc Mike Finnley posted an interesting article about early pocket calculators that caught my eye (I avoided reading any comments). I enjoyed his construction notes, given many of these older [more…]

Going Postal

Cipher – A Tribute To OldTrout

7th February 2022 Doc Mike Finnley 3462 Comments

Introduction Cipher – meaning zero (0), nothing or an empty set. Decipher – to make something out of that seemingly meaningless nothing. Caroline or ‘Old Trout’ (as we affectionately remember her) was a brilliant mathematician. [more…]

Computing

Snowflakes

24th January 2022 OldTrout 3820 Comments

I have always loved snowflakes.  On a chairlift, with your head down into a biting wind, one is allowed about twenty minutes to study them settling on your clothes. They have two classes of symmetry; [more…]

OldTrout, Going Postal
18th Century

Sophie Germain Primes and Cunningham Chains

28th September 2020 OldTrout 2231 Comments

A Sophie Germain prime is a prime number such that is also a prime number. That is, ,  where and are both prime.  For example, . The sequence begins Sophie Germain () explored these primes [more…]

Mathematics

The Number of Derangements

7th September 2020 OldTrout 2048 Comments

Read as : the limit, as approaches infinity, of subfactorial divided by factorial is equal to divided by which approximates to , where is Euler’s number, The Hat Check Problem, as first described by Montmort [more…]

Mathematics

On Punctuation!

31st August 2020 OldTrout 3524 Comments

Apparently, some subset of younger people are upset and intimidated about the use of full stops in text and other messages. I am not sure what they would think about the ellipsis, … , or [more…]

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