Daniel Mentrard GeoGebra ???

Un carré n'est qu'un rectangle particulier... et un losange particulier !

J'ai écrit ma thèse en LateX sous Emacs...

Riemann rearrangement theorem : "if an infinite series of real numbers is conditionally convergent, then its terms can be arranged in a permutation so that the new series converges to an arbitrary real number, or diverges."

Pour la Science: Une conjecture analogue à l'hypothèse de Riemann aurait été résolue. pourlascience.fr/sd/mathematiqu… via @GoogleNews

Le Grand Oral n'est décidément pas adapté aux matières scientifiques. Le jury ne pourra pas demander à un élève d'écrire une équation ou une formule au tableau... Pourquoi ??? eduscol.education.fr/729/presentati…

裏面あり。

The heart appears to move when the image is swayed.

We always need 12 pentagons to create a sphere!

been there done that

In #MMSP2023 , I've presented a new method for Image & Video Secret Sharing : "Selective Secret Sharing scheme for privacy of image and video compressed in MPEG-like formats". It protects image and video content without key management. researchgate.net/publication/37…

5.X Quote of the Day Israil Gelfand (1913 - 2009) "If you ask a drunkard what number is larger, 2/3 or 3/5, he might not be able to tell you.

It's today ! 6×10^23 Happy #AvogadroDay of the century 🥑🎉

Both blocks are the same color. use your finger to cover the middle line. An example of the Cornsweet illusion using shading and gradients to challenge perception, an optical illusion that was described in detail by Tom Cornsweet in the late 1960s

It is my great honor to receive ISO/IEC Excellence Award, regarding my role as editor of ISO/IEC 23000-21 MPEG A - Visual Identity Management Application Format. This concludes my 20 years of activities in video and my 10 years in MPEG standardization! linkedin.com/posts/cyrilber…

Blue or yellow strips appear to wave, though they are stationary. (inverse belly dancer illusion)

Very exciting things just around the corner for us at Waabi …

Rings appear to be spirals.

Vertical or horizontal edges appear to tilt.

The inner square appears to move.