# ^^Roberto Occa girovagare matematico.

## Varie

1. 21-11-2020 The Only Knot You Need To Know...
2. 21-11-2020 Copper's Surprising Reaction to Strong Magnets | Force Field Motion Dampening
3. 21-11-2020 10 science esperiments. Motore a pila stilo, magnete e filo.
4. 21-11-2020 prb 3 4 5

# Video

1. Circolo trigonometrico
2. Notazione potenze col triangolo
3. Algebraic Calculus One - Coming soon!    njwildberger
4. corsi https://www.openlearning.com/courses/archimedes-the-law-of-the-lever

6. MindYourDecisions viral math problems
7. 21-11-2020 Mathologer accessible explanations of hard and beautiful math(s)
8. yt/Shortest path Zach Star

## Zeta function. The Riemann hypothesis

1. Riemann Hypothesis - Numberphile
2. The Key to the Riemann Hypothesis - Numberphile
3. Visualizing the Riemann hypothesis and analytic continuation 3Blue1Brown
4. gen2021Alex Kontorovich, professor of mathematics at Rutgers University
5. What is the Riemann Hypothesis? Physics Explained
6. Euler Finds The Prime Product Formula
7. wp/Prime-counting_function | wp/Euler_product_formula

12-9-2017 wp/Hyperreal_number

26-8-2017

24ago2017

1. Partendo da Vladimir Arnold citato da AndreaFarusi
2. Four-vertex_theorem(or more vertex): plane oval has at least four curvature extrema
3. Evolute of a curve
• the locus of all its centers of curvature
• equi: the envelope of the normals to a curve.

es: The evolute of a circle is therefore a single point at its center.

4. Poligono semplice. Teorema della curva di Jordan.
5. wp/Poliedro_monostabile

MindYourDecisions
Wow. I knew about the cardiod, the Mandlebrot set, and the times table circular patterns, but I never stopped to think about how they were connected--just amazing! Students often get frustrated when learning math asking, "When will we ever use this?" I think many adults regret not practicing math in school. And conversely, every single part of math I've learned has eventually found use or at least been entertaining later in life. It reminds me of Steve Jobs' commencement speech at Stanford in 2005. He took calligraphy in college when typography was not really a practical field. But it later gave him the idea to put multiple typefaces on the Mac. The connections only made sense in hindsight, as he points out: "Of course it was impossible to connect the dots looking forward when I was in college. But it was very, very clear looking backward 10 years later. Again, you can't connect the dots looking forward; you can only connect them looking backward. So you have to trust that the dots will somehow connect in your future. You have to trust in something — your gut, destiny, life, karma, whatever. This approach has never let me down, and it has made all the difference in my life." From the full speech: http://news.stanford.edu/news/2005/june15/jobs-061505.html