SunJester
@sun-jester.bsky.social
Likes math, science & art. Go eclecticism!
No AI
I also write a litte bit
for short stories and poems: https://www.wattpad.com/user/Sun_Jester
for Last Time ‘Round: https://www.royalroad.com/profile/686795
My blog: https://sunjestermusings.blogspot.com
No AI
I also write a litte bit
for short stories and poems: https://www.wattpad.com/user/Sun_Jester
for Last Time ‘Round: https://www.royalroad.com/profile/686795
My blog: https://sunjestermusings.blogspot.com
This thursday it'll be 200 years after Riemann's birth.
The Riemann integral is a way to define what the definite integral of a function is. The area under a curve can be approximated by many small vertical rectangles!
#MathSky #200YearsRiemann #HistSky
The Riemann integral is a way to define what the definite integral of a function is. The area under a curve can be approximated by many small vertical rectangles!
#MathSky #200YearsRiemann #HistSky
September 16, 2026 at 7:44 PM
This thursday it'll be 200 years after Riemann's birth.
The Riemann integral is a way to define what the definite integral of a function is. The area under a curve can be approximated by many small vertical rectangles!
#MathSky #200YearsRiemann #HistSky
The Riemann integral is a way to define what the definite integral of a function is. The area under a curve can be approximated by many small vertical rectangles!
#MathSky #200YearsRiemann #HistSky
This thursday it'll be 200 years after Riemann's birth.
Riemannian geometry generalised the notions of curvature and distance that Gauss had developed for smooth surfaces to manifolds of arbitrary dimension. This is also the first mention of >4 dimensions*
#MathSky #200YearsRiemann #HistSky
Riemannian geometry generalised the notions of curvature and distance that Gauss had developed for smooth surfaces to manifolds of arbitrary dimension. This is also the first mention of >4 dimensions*
#MathSky #200YearsRiemann #HistSky
September 15, 2026 at 7:28 PM
This thursday it'll be 200 years after Riemann's birth.
Riemannian geometry generalised the notions of curvature and distance that Gauss had developed for smooth surfaces to manifolds of arbitrary dimension. This is also the first mention of >4 dimensions*
#MathSky #200YearsRiemann #HistSky
Riemannian geometry generalised the notions of curvature and distance that Gauss had developed for smooth surfaces to manifolds of arbitrary dimension. This is also the first mention of >4 dimensions*
#MathSky #200YearsRiemann #HistSky
This thursday it'll be 200 years after Riemann's birth.
Riemann surfaces are 1-dimensional connected complex manifolds, i.e. 2-dim connected real manifolds with holomorphic transition maps. He introduced these to study multivalued functions over C, such as sqrt
#MathSky #200YearsRiemann #HistSky
Riemann surfaces are 1-dimensional connected complex manifolds, i.e. 2-dim connected real manifolds with holomorphic transition maps. He introduced these to study multivalued functions over C, such as sqrt
#MathSky #200YearsRiemann #HistSky
September 14, 2026 at 10:11 PM
This thursday it'll be 200 years after Riemann's birth.
Riemann surfaces are 1-dimensional connected complex manifolds, i.e. 2-dim connected real manifolds with holomorphic transition maps. He introduced these to study multivalued functions over C, such as sqrt
#MathSky #200YearsRiemann #HistSky
Riemann surfaces are 1-dimensional connected complex manifolds, i.e. 2-dim connected real manifolds with holomorphic transition maps. He introduced these to study multivalued functions over C, such as sqrt
#MathSky #200YearsRiemann #HistSky
x^2 + y^2 = 1 defines a circle, but as n->oo the equation
|x|^n + |y|^n = 1
looks more and more like a square
This is because for |y| < 1 we have |y|^n -> 0, so that |x|^n has to approach 1, i.e. |x| -> 1, which gives the vertical sides (the horizontal sides are the same)
#mathsky #mathematics
|x|^n + |y|^n = 1
looks more and more like a square
This is because for |y| < 1 we have |y|^n -> 0, so that |x|^n has to approach 1, i.e. |x| -> 1, which gives the vertical sides (the horizontal sides are the same)
#mathsky #mathematics
August 25, 2026 at 9:06 PM
x^2 + y^2 = 1 defines a circle, but as n->oo the equation
|x|^n + |y|^n = 1
looks more and more like a square
This is because for |y| < 1 we have |y|^n -> 0, so that |x|^n has to approach 1, i.e. |x| -> 1, which gives the vertical sides (the horizontal sides are the same)
#mathsky #mathematics
|x|^n + |y|^n = 1
looks more and more like a square
This is because for |y| < 1 we have |y|^n -> 0, so that |x|^n has to approach 1, i.e. |x| -> 1, which gives the vertical sides (the horizontal sides are the same)
#mathsky #mathematics
Evangelion (full title is Neon Genesis Evangelion) is an anime. The main antagonists are angels. One of them, called Ramiel, is just a floating octahedron
(The gif below is from the remake movies, but whatever)
(The gif below is from the remake movies, but whatever)
August 22, 2026 at 7:16 PM
Evangelion (full title is Neon Genesis Evangelion) is an anime. The main antagonists are angels. One of them, called Ramiel, is just a floating octahedron
(The gif below is from the remake movies, but whatever)
(The gif below is from the remake movies, but whatever)
Wonder what the consensus is on Sapphire and Steel
My personal views on the five serials:
1: pretty good, if a little clunky
2: genuinely good
3: also pretty good, some nice scary stuff
4: boring and bad
5: easily the best one
6: intriguing, too bad the series got cancelled
#scifi #sciencefiction
My personal views on the five serials:
1: pretty good, if a little clunky
2: genuinely good
3: also pretty good, some nice scary stuff
4: boring and bad
5: easily the best one
6: intriguing, too bad the series got cancelled
#scifi #sciencefiction
August 14, 2026 at 9:45 PM
Wonder what the consensus is on Sapphire and Steel
My personal views on the five serials:
1: pretty good, if a little clunky
2: genuinely good
3: also pretty good, some nice scary stuff
4: boring and bad
5: easily the best one
6: intriguing, too bad the series got cancelled
#scifi #sciencefiction
My personal views on the five serials:
1: pretty good, if a little clunky
2: genuinely good
3: also pretty good, some nice scary stuff
4: boring and bad
5: easily the best one
6: intriguing, too bad the series got cancelled
#scifi #sciencefiction
Pretty funny sign I saw in Spain for the #eclipse
I’d think that driving with eclipse glasses on is obviously a bad idea, but I guess not
I’d think that driving with eclipse glasses on is obviously a bad idea, but I guess not
August 14, 2026 at 12:43 PM
Pretty funny sign I saw in Spain for the #eclipse
I’d think that driving with eclipse glasses on is obviously a bad idea, but I guess not
I’d think that driving with eclipse glasses on is obviously a bad idea, but I guess not
The #eclipse yesterday was really spectacular. It was my first ever total eclipse and it blew all my expectations out of the water
The fact I was almost alone just made it even more spectacular
Seriously, if you ever have the chance to see one, do it
The fact I was almost alone just made it even more spectacular
Seriously, if you ever have the chance to see one, do it
August 13, 2026 at 3:30 PM
The #eclipse yesterday was really spectacular. It was my first ever total eclipse and it blew all my expectations out of the water
The fact I was almost alone just made it even more spectacular
Seriously, if you ever have the chance to see one, do it
The fact I was almost alone just made it even more spectacular
Seriously, if you ever have the chance to see one, do it
Just finished Ulysses … Wow, what a book
Even with guides, I understood maybe 10% of it, but still. It’s an absolute breathtaking achievement. It took Joyce 7 years to write it and you can tell
I’ve never read anything like it and likely never will again (1/2)
#books #booksky #literature
Even with guides, I understood maybe 10% of it, but still. It’s an absolute breathtaking achievement. It took Joyce 7 years to write it and you can tell
I’ve never read anything like it and likely never will again (1/2)
#books #booksky #literature
August 7, 2026 at 11:54 AM
Just finished Ulysses … Wow, what a book
Even with guides, I understood maybe 10% of it, but still. It’s an absolute breathtaking achievement. It took Joyce 7 years to write it and you can tell
I’ve never read anything like it and likely never will again (1/2)
#books #booksky #literature
Even with guides, I understood maybe 10% of it, but still. It’s an absolute breathtaking achievement. It took Joyce 7 years to write it and you can tell
I’ve never read anything like it and likely never will again (1/2)
#books #booksky #literature
Still not really sure how to feel about this tbh…
Like, on the one hand, it is really cool that another famous problem has been solved.
On the other hand, as someone hoping to at least do a phd in math, I find this quite terrifying... (1/n)
#mathsky #mathematics #math #maths
Like, on the one hand, it is really cool that another famous problem has been solved.
On the other hand, as someone hoping to at least do a phd in math, I find this quite terrifying... (1/n)
#mathsky #mathematics #math #maths
July 31, 2026 at 8:34 PM
Still not really sure how to feel about this tbh…
Like, on the one hand, it is really cool that another famous problem has been solved.
On the other hand, as someone hoping to at least do a phd in math, I find this quite terrifying... (1/n)
#mathsky #mathematics #math #maths
Like, on the one hand, it is really cool that another famous problem has been solved.
On the other hand, as someone hoping to at least do a phd in math, I find this quite terrifying... (1/n)
#mathsky #mathematics #math #maths
July 28, 2026 at 7:48 AM
Recently learned of these pretty cool #geometry theorems: on the left we have proposition III.22 from Euclid's Elements and on the right we have Pitot's theorem, from the 180th century
#math #mathsky #maths #mathematics
#math #mathsky #maths #mathematics
June 23, 2026 at 1:57 PM
Recently learned of these pretty cool #geometry theorems: on the left we have proposition III.22 from Euclid's Elements and on the right we have Pitot's theorem, from the 180th century
#math #mathsky #maths #mathematics
#math #mathsky #maths #mathematics
I'm honestly kinda proud of how this #cover turned out, mainly cause I didn't take that picture to be a cover
#writingcommunity #art #photography
btw, you get a cookie if you can guess what mountain that is in the background ;)
#writingcommunity #art #photography
btw, you get a cookie if you can guess what mountain that is in the background ;)
June 3, 2026 at 7:59 PM
I'm honestly kinda proud of how this #cover turned out, mainly cause I didn't take that picture to be a cover
#writingcommunity #art #photography
btw, you get a cookie if you can guess what mountain that is in the background ;)
#writingcommunity #art #photography
btw, you get a cookie if you can guess what mountain that is in the background ;)
I've moved my two short stories over to #royalroad, if I write some more they'll be added to that collection
#writingcommunity #shortstory
www.royalroad.com/fiction/1672...
#writingcommunity #shortstory
www.royalroad.com/fiction/1672...
May 11, 2026 at 8:12 PM
I've moved my two short stories over to #royalroad, if I write some more they'll be added to that collection
#writingcommunity #shortstory
www.royalroad.com/fiction/1672...
#writingcommunity #shortstory
www.royalroad.com/fiction/1672...
~Inaccesible Treasure~
#poem #poetry #writingcommunity
For more bad poems, check out www.wattpad.com/story/393302...
#poem #poetry #writingcommunity
For more bad poems, check out www.wattpad.com/story/393302...
May 1, 2026 at 9:39 PM
~Inaccesible Treasure~
#poem #poetry #writingcommunity
For more bad poems, check out www.wattpad.com/story/393302...
#poem #poetry #writingcommunity
For more bad poems, check out www.wattpad.com/story/393302...
Today is Alexander Grothendieck's birthday!
He's probably the most important mathematician of the 20th century, but sadly enough almost completely unknown to the general public
#math #maths #mathematics #mathsky #scisky #sciencesky #borntoday
He's probably the most important mathematician of the 20th century, but sadly enough almost completely unknown to the general public
#math #maths #mathematics #mathsky #scisky #sciencesky #borntoday
March 28, 2026 at 8:55 PM
Today is Alexander Grothendieck's birthday!
He's probably the most important mathematician of the 20th century, but sadly enough almost completely unknown to the general public
#math #maths #mathematics #mathsky #scisky #sciencesky #borntoday
He's probably the most important mathematician of the 20th century, but sadly enough almost completely unknown to the general public
#math #maths #mathematics #mathsky #scisky #sciencesky #borntoday
March 23, 2026 at 10:36 PM
This is a dance off! If you see this, QRP with a dance or you will be eliminated!
March 23, 2026 at 9:31 PM
This is a dance off! If you see this, QRP with a dance or you will be eliminated!
Can we just take a few seconds to appreciate the pacing in Alien? Seriously, how is it nearly 2 hours long?
I swear I've seen 10-minute youtube videos that felt longer than it
#filmsky
I swear I've seen 10-minute youtube videos that felt longer than it
#filmsky
February 23, 2026 at 2:37 PM
Can we just take a few seconds to appreciate the pacing in Alien? Seriously, how is it nearly 2 hours long?
I swear I've seen 10-minute youtube videos that felt longer than it
#filmsky
I swear I've seen 10-minute youtube videos that felt longer than it
#filmsky
Quick explanation of what it feels like to learn more advanced #mathematics. Specifically, how do you answer the question
"How many intersections do two algebraic varieties have?"
You could probably do this with any math subject tbh...
#mathsky #maths #scisky
"How many intersections do two algebraic varieties have?"
You could probably do this with any math subject tbh...
#mathsky #maths #scisky
January 28, 2026 at 9:11 PM
Quick explanation of what it feels like to learn more advanced #mathematics. Specifically, how do you answer the question
"How many intersections do two algebraic varieties have?"
You could probably do this with any math subject tbh...
#mathsky #maths #scisky
"How many intersections do two algebraic varieties have?"
You could probably do this with any math subject tbh...
#mathsky #maths #scisky
For some reason the additive formula for binomial coefficients is often proven using the formulas for the binomial coefficients, even though there is a way better combinatorial proof.
Just remember that n choose k is how many ways there are to choose k balls out of n.
#math #mathematics #mathsky
Just remember that n choose k is how many ways there are to choose k balls out of n.
#math #mathematics #mathsky
October 6, 2025 at 8:27 PM
For some reason the additive formula for binomial coefficients is often proven using the formulas for the binomial coefficients, even though there is a way better combinatorial proof.
Just remember that n choose k is how many ways there are to choose k balls out of n.
#math #mathematics #mathsky
Just remember that n choose k is how many ways there are to choose k balls out of n.
#math #mathematics #mathsky
#AugustOfGroups: every day of August I'll post all groups whose order is the number of that day. Today August 30th.
There are four groups of order 30: Z/30Z, D15, (Z/5Z) × D3 and (Z/3Z) × D5.
I'm a particular fan of the symmetry in those last two
#math #maths #mathematics #mathsky
There are four groups of order 30: Z/30Z, D15, (Z/5Z) × D3 and (Z/3Z) × D5.
I'm a particular fan of the symmetry in those last two
#math #maths #mathematics #mathsky
August 30, 2025 at 7:05 PM
#AugustOfGroups: every day of August I'll post all groups whose order is the number of that day. Today August 30th.
There are four groups of order 30: Z/30Z, D15, (Z/5Z) × D3 and (Z/3Z) × D5.
I'm a particular fan of the symmetry in those last two
#math #maths #mathematics #mathsky
There are four groups of order 30: Z/30Z, D15, (Z/5Z) × D3 and (Z/3Z) × D5.
I'm a particular fan of the symmetry in those last two
#math #maths #mathematics #mathsky