Revisiting my video that has the most number of dislikes, will this make the original has more or less dislikes?? I do not know! This is just a math paradox showing we can't do ratio with infinities in the usual sense. Suscribe to @blackpenredpen for more…

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So, I finally have a chance to show you how to solve a definite…

This problem was part of a written interview test for Amazon in India. A drawer contains 12 identical black socks and 12 identical white socks. If you pick 2 socks at random, what is the probability of getting a matching pair?

My blog post for this video…

Research in Options 2017 - Opening Session IMPA, Rio de Janeiro, November 25 – 30, 2017 Opening Session The use of sophisticated mathematical tools in financ...

Research in Options 2017 - Minicourse Marco Avellaneda (NYU, USA) IMPA, Rio de Janeiro, November 25 – 30, 2017 Minicourse Marco Avellaneda (NYU, USA) Volatil...

Research in Options 2017 - Minicourse Bruno Dupire (Bloomberg, NY) IMPA, Rio de Janeiro, November 25 – 30, 2017 Minicourse Bruno Dupire (Bloomberg, NY) Some ...

Research in Options 2017 - Martino Grasselli (U. Padova, Italy) IMPA, Rio de Janeiro, November 25 – 30, 2017 Martino Grasselli (U. Padova, Italy) A Consisten...

Research in Options 2017 - Emmanuel Gobet (Polytechnique, France) IMPA, Rio de Janeiro, November 25 – 30, 2017 Emmanuel Gobet (Polytechnique, France) Modelin...

In this video I calculate an antiderivative of the square root of 1-x^2 using trigonometric substitution (and the triangle method) and along the way I also calculate an antiderivative of cos^2(x). Enjoy!

Small correction: It should be [-pi/2,pi/2], not (…