Alex Smith ✓

@ninja_maths · joined 21 Oct 2010

Chief content architect @_MathAcademy_ | Math PhD | AKA MathNinja. Developing (possibly) the world's largest online math curriculum.

19 333Followers

895Following

2 687Posts total

2.7MViews on collected posts

Ultimi post

Alex Smith ✓@ninja_maths9 Sep

One thing I didn't fully appreciate until recently is that finding a blowup counterexample in the forced Navier-Stokes case is much easier than in the unforced case. Forcing terms give you an extra set of knobs to dial in order to engineer a singularity. Taking those away 2.5K views · 7 likes · 0 reposts · 0 replies Open on X →

Alex Smith ✓@ninja_maths9 Sep

When a fluid PDE like Navier-Stokes develops a finite-time singularity, it is not a prediction of a physical explosion. It is a mathematical warning sign. The warning basically says: "The assumptions made when forming this model have reached their limit, and this equation 47.4K views · 491 likes · 33 reposts · 20 replies Open on X →

Alex Smith ✓@ninja_maths9 Sep

Btw the Navier Stokes problem comes down to: if we lived in a truly continuous universe, fluids might sometimes explode. It’s an issue for the universe of classical mathematics, but does not apply to the computational universe we are in. 158.5K views · 1.8K likes · 72 reposts · 101 replies Open on X →

Alex Smith ✓@ninja_maths8 Sep

The Navier-Stokes existence and smoothness problem has finally fallen. OpenAI will take as much credit as it can. But we must pay tribute to the brilliant human minds who paved the way. Tristan Buckmaster, Levent Alpoge, Diego Cordoba, Luis Martınez-Zoroa, to name just a few. 15.5K views · 235 likes · 14 reposts · 22 replies Open on X →

Alex Smith ✓@ninja_maths25 Aug

Scientific and standard calculators are now available in the @_MathAcademy_ user interface! https://t.co/VmLuHHdcUQ

3.3K views · 86 likes · 3 reposts · 7 replies Open on X →

Alex Smith ✓@ninja_maths8 Jul

@ninja_maths it's always been so obvious that kids are far more capable than adults in capacity of learning - it's such a shame that we stunt many of our youth by the lowest common denominator 4.8K views · 60 likes · 2 reposts · 0 replies Open on X →

Alex Smith ✓@ninja_maths7 Jul

@ninja_maths This sort of stuff proves how we don’t need 12 years of schooling. Every summer holiday my mum would teach me all the maths for the incoming school year so I was always ahead, which irritated some teachers. 10.4K views · 336 likes · 6 reposts · 7 replies Open on X →

Alex Smith ✓@ninja_maths6 Jul

@ninja_maths With fable existing now, how long before we get an immersive, highly enjoyable game world that makes learning these concepts as enjoyable as finding and mastering a new item in elden ring? 25.8K views · 280 likes · 1 reposts · 15 replies Open on X →

Alex Smith ✓@ninja_maths6 Jul

For anyone wondering how a third-grader can complete six years' worth of math in a single year AND score a 5 on the AP Calculus exam. This knowledge graph spans 3,000 math topics, from 4th grade to the university level, providing the perfect basis for mastery learning. https:/

2.4M views · 9.7K likes · 729 reposts · 147 replies Open on X →

Rispetto ad account della stessa dimensione

9 post degli ultimi 90 giorni, accanto alla fascia di 10K–100K follower. arriva a molti, ma pochi di loro reagiscono.

Visualizzazioni mediane15 504questo account949mediana per 10K–100K

Copertura, %80.19%questo account3.31%mediana per 10K–100K

Interazione, %1.25%questo account1.88%mediana per 10K–100K

Metrica	Questo account	Mediana per 10K–100K	Rapporto
Visualizzazioni mediane per post	15 504	949	16.3×
Copertura (visualizzazioni ÷ follower)	80.19%	3.31%	24.2×
Tasso di interazione	1.25%	1.88%	0.66×

Altri account di questa fascia → Confronta con un altro account → Come sono costruiti questi parametri →

Growth & engagement

How the posts we collected actually performed: views and reaction rate post by post, what the audience did with them, and where the follower count goes.

Views per post

2.4M6 Jul

25.8K

10.4K7 Jul

4.8K8 Jul

3.3K25 Aug

15.5K8 Sep

158.5K9 Sep

47.4K

2.5K

Last 9 collected posts, oldest on the left. The scale is logarithmic: one post can outrun the rest a hundred times over.

Engagement rate per post

0.43%6 Jul

1.15%

3.36%7 Jul

1.28%8 Jul

2.90%25 Aug

1.75%8 Sep

1.25%9 Sep

1.15%

0.28%

Reactions — likes, reposts, replies and quotes — divided by views. Median for 10K–100K accounts is 1.88%.

What the audience does

Likes55.2%13 031 in total

Reposts3.6%860 in total

Replies1.4%319 in total

Bookmarks39.8%9 411 in total

Share of every reaction we collected for this account. Replies mean argument, reposts mean endorsement, bookmarks mean the post was worth keeping.

The follower curve appears once this account has two daily snapshots — we take one a day, and this one is on its first.

Ultimi post

Rispetto ad account della stessa dimensione

Growth & engagement

Views per post

Engagement rate per post

What the audience does

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