Mathematics

cross-posted from: https://lemmy.today/post/9963785

Hi,

I've found on Wikipedia the following formula to calculate the BMR estimation

We can read just after the formula:

According to this formula, the woman in the example above has a BMR of 1,204 kilocalories (5,040 kJ) per day.

But when I take their example of a 55-year-old woman weighing 130 pounds (59 kg) and 66 inches (170 cm)

and do ((10*55)+(6,25*170)-(5*55))-161 I get 1,217 and not 1,204

Am I doing something wrong ?

Thanks.

A curious math problem I came up with: given a target, what's the fewest digits an integer must have (in a given base) to contain all integers from 0 to the target, as substrings?

http://wok.oblomov.eu/mathesis/number-substrings/

@mathematics @[email protected] @[email protected]

e.g. for a target of 19 a candidate representative would be 1011213141516171819 in base 10, that has 19 digits. Can it be done in less, or is $\sigma_10(19) = 19$?
Can we find a general rule? Any properties of this function?

#math #maths #numberTheory #combinatorics

Geometric Shapes and Their Symbolic Meanings

https://www.learnreligions.com/geometric-shapes-4086370

Forms ranging from circles to dodekagrams have significance in many philosophies

@[email protected] @[email protected]

#mathematics #geometry

Merging Fields, Mathematicians Go the Distance on Old Problem

https://www.quantamagazine.org/merging-fields-mathematicians-go-the-distance-on-old-problem-20240401/

Mathematicians have illuminated what sets of points can look like if the distances between them are all whole numbers.

#mathematics @[email protected] @[email protected]

Mathematics Ancient Egypt, The Incredible Achievements

https://mythologis.com/blogs/egyptian-mythology/mathematics-ancient-egypt

The #ancientEgyptians were known for their advanced understanding of #mathematics and its many practical uses. From the construction of the iconic #pyramids to their use of algebraic techniques to solve problems, the ancient Egyptians were masters of the mathematical arts.

@[email protected] @[email protected]

How the number pi inspired a writing style

https://www.bbc.com/future/article/20160311-how-the-number-pi-inspired-a-writing-style

The number pi, which is celebrated with its own day on 14 March, has inspired “Pilish” – a fiendishly challenging form of writing. There’s even a Pilish novel. Give it a go yourself, it can be strangely addictive...

#pilish #pi #pigreco #mathematics #writing #poetry @[email protected] @[email protected]

Number symbolism

https://www.britannica.com/topic/number-symbolism

#IanStewart for #Britannica

#mathematics @[email protected] @[email protected]

Topologists Tackle the Trouble With Poll Placement

https://www.quantamagazine.org/topologists-tackle-the-trouble-with-poll-placement-20240326/

Mathematicians are using topological abstractions to find places where it’s hard to vote.

#topology #mathematics @[email protected] @[email protected]

Mathematician who tamed randomness wins Abel Prize

https://www.nature.com/articles/d41586-024-00839-6

#MichelTalagrand laid mathematical groundwork that has allowed others to tackle problems involving random processes.

#AbelPrize #mathematics @[email protected] @[email protected]

It's an approximation but still... It's an interesting quick read.