fpmaths @fpmaths

Professor of Geometry at the University of Calabria Joined May 2020

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Massimo @Rainmaker1973

4 years ago

This simple experiment shows the importance of pressure in siphoning. The middle bottle is capped and the air inside it takes space: that's why the fluid level cannot increase until the cap is removed [source: buff.ly/3gyawzS]

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Tech Burrito @TechBurritoUno

4 years ago

This is how to solve Rubik’s cube

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fpmaths @fpmaths

4 years ago

@SamuelGWalters 1 0 1 1 If every T-invariant subspace has a T-invariant complement, then (by easy induction on the dimension) one can prove that the operator is diagonalizable over (a subfield of) the algebraic closure of the definition field. So any non-diagonalizable operator over C works.

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poorly drawn lines @PDLComics

4 years ago

better

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Fermat's Library @fermatslibrary

4 years ago

Tupper's self-referential formula is a formula that visually represents itself when graphed at a specific location in the (x, y) plane.

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Cliff Pickover @pickover

4 years ago

This is a physics joke, widely circulating on the Web. Coulomb cheating on a test. bit.ly/3fOmlOz

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fpmaths @fpmaths

4 years ago

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Some theorems @CihanPostsThms

4 years ago

For every field k and n∈ℕ, there exists a k-algebra embedding k[[x₁,...,x_n]] ↪︎ k[[x,y]] of formal power series.

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Vala Afshar @ValaAfshar

4 years ago

The benefits of truly understanding math and geometry

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Massimo @Rainmaker1973

4 years ago

This Japanese technique to fold shirts in 2 seconds seems to find a secret topology hidden inside clothes [full video, HD, DaveHax: buff.ly/37sSeXf]

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Cliff Pickover @pickover

4 years ago

Mathematics. This joke, widely circulating on the web, is quite esoteric -- and sure to befuddle the vast majority of viewers.

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Fermat's Library @fermatslibrary

4 years ago

A curious identity involving e and π

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Cliff Pickover @pickover

4 years ago

Reality shatter. Our illusory world. The psychology of perception. These boxes are not moving. (GIF by @jagarikin) x.com/pickover/statu…

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Massimo @Rainmaker1973

4 years ago

Gabriel's horn is a topologic entity with a curious property of having an infinite surface area but a finite volume [read more: buff.ly/2p6tvF4]

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Massimo @Rainmaker1973

4 years ago

The ambiguous illusion objects series invented by mathematician Kokichi Sugihara also includes a Batman and a Superman logo, printed and sold by 3DNY Design [source, more: buff.ly/2yHS4yB]

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Massimo @Rainmaker1973

4 years ago

A world of languages - and how many speak them [source, read more: bit.ly/1PNrBRi]

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Massimo @Rainmaker1973

4 years ago

Debbie Parker captured the exact moment a lightning hit a tree in Moorefield, Hardy County, West Virginia on June 23, 2022 [source: buff.ly/3A6G47h]

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Massimo @Rainmaker1973

4 years ago

Many drivers go to great lengths to avoid having to parallel park. This gif tries to give you a tutorial for a proper parallel parking maneuver [source, read the tutorial: buff.ly/3hBCo2f]

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Massimo @Rainmaker1973

4 years ago

This image shows what happens when a small space debris object hits a spacecraft [source, read more: buff.ly/2owrIst]

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Massimo @Rainmaker1973

4 years ago

Burning steel wool makes it heavier. Why? The increase in mass comes from the additional oxygen that combines with iron to form a new solid, iron oxide. Fe(s) + O₂(g) ➝ Fe₂O₃(s) In other words, fast rusting. [read more: buff.ly/2QJ21Bc]