Euler's birthday today...

im invisible

...so it was.

can't seem to get the last bit, but shur

TheBody

im invisible wrote: »

...so it was.

can't seem to get the last bit, but shur

Took me a minute to figure out what you were on about there!!

ardmacha

Euler had 13 children, I wonder how many descendants he has today.

locum-motion

Would there be any possibility of a clue as to what the map means?

Yakuza

Google "bridges of Königsberg"

locum-motion

Many thanks.
Very interesting.

Could the same theory be adapted to trying to find a way to walk across Dublin without passing any pubs?
(Easy Solution:

Don't pass them. Go into each one, and have a drink in it!

)

hivizman

ardmacha wrote: »

Euler had 13 children, I wonder how many descendants he has today.

Eight of Euler's children died in infancy, but three sons and two daughters survived until adulthood and had children of their own.

In 1983, to mark the 200th anniversary of Euler's death, there was a symposium on his life and work, and some of the participants traced all of Euler's known descendants. This was published in Russian in N. N. Bogolyubov, G. K. Mikhailov, A. P. Yushkevich (Eds.) Razvitiye idey Leonarda Eylera i sovremennaya nauka (Moscow 1988). In the recent biography Leonhard Euler by Emil A. Fellmann (Basel: Birkhäuser Verlag, 2007), the findings of this study have been summarised:

Recently, in a Soviet omnibus volume, there appeared a kind of continuation of the work of Karl Euler [a descendant of Euler who wrote a genealogical study in 1955]. The three authors of this ”new genealogy” made it their task to substantially improve and complete the annotations in the earlier work, and –– as far as it is possible today –– to list all descendants of Leonhard Euler, also in the feminine branches which do not carry the name Euler. The authors succeeded in eliciting more than a thousand descendants of Leonhard Euler, who all carry resp. carried his name; of these, about 400 are still alive today, more than half of them in Russia and –– according to verbal information from the former parliamentarian Alexander Euler in Basel –– 16 resp. 29 in Switzerland.

As the data above are thirty years old, a complete new generation of descendants will have been born, so there are probably around 600 living descendants of Leonhard Euler.

ardmacha

Incidentally Streetview for Kaliningrad has recently come online, although since some of the bridges are gone it may not help.

PaulieBoy

ardmacha wrote: »

Euler had 13 children, I wonder how many descendants he has today.

They would have grown exponentially so I would imagine there would be quite a lot!

equivariant

PaulieBoy wrote: »

They would have grown exponentially so I would imagine there would be quite a lot!

Children that grow exponentially - that's a scary thought

ray giraffe

equivariant wrote: »

Children that grow exponentially - that's a scary thought

Euler introduced the exponential function, so his kids have to grow exponentially! :cool:

MathsManiac

Going off on a linguistic tangent, why do people say "grows exponentially" as if that always implies an incredible pace of growth. It is possible, after all, for quantities A and B to be equal when t=0, for A to grow linearly and B to grow exponentially, and yet for A to remain bigger than B for my entire life, or for a billion years for that matter.

So, children growing exponentially - big deal, I say!