Recent content by Edgardo

IBM is offering their Quantum Explorers program. It runs from Jul 06, 2023 to Feb 01, 2024. Registration here: https://challenges.quantum-computing.ibm.com/quantum-explorers-23 More information: Quantum Explorers: A Game-Based Approach to Quantum Education From the registration website:

Have a look at the open access textbook Quantum Computing for the Quantum Curious by Hughes et al. Description from the Springer website: "This book is open access, which means that you have free and unlimited access. Demystifies quantum computing, using only high school physics. Bridges the...

Use the discount code CYBERWEEK19 to purchase English IT eBooks from Springer online for only 7 Euro. Go to the checkout and enter the code. Afterwards, you can proceed browsing the book list and it automatically shows if the code was applied. Note: At the checkout read again if the discount...

Springer math books are 40% off till Nov 30. Coupon code is MATH19PE. I bought Linear Algebra by Axler , the analysis books by Pugh and Abbott. Any further recommendations for good books?

5 minute video by Veritasium (Derek Muller) on the event:

You are asking about the difference between "Proof by contraposition" and "Proof by contradiction", and here is an example.To prove p \rightarrow q: - In proof by contraposition you start by assuming that \neg q is true and derive the statement \neg p. Here, the path is clear, i.e. you start at...

I typed your equation and "simplify" into wolframalpha, and this is what I got It has a simpler looking form for x, d and theta real.

Here is a derivation from stats.stackexchange that you may find helpful. It is basically about the chain rule for derivatives.

Result of match 4: Article by GoGameGuru Article by Wired

Great article on the third match between AlphaGo and LeeSedol.

Result of the second match between AlphaGo and Lee Sedol.

Look how beautiful the ostrich's running technique is! My favorite part is the left and right swerving, but why does the ostrich do it?

Right-click on the math error, go to Math Settings -> Math Renderer and try e.g. HTML-CSS (or some other renderer).

Here is a good explanation: http://mathforum.org/library/drmath/view/74063.html

Try to get an intuitive feeling for what the Kronecker-Delta \delta_{ij} does. Consider this sum: \sum_{j=1}^{n} c_j = c_1 + c_2 + \dots + c_n Now observe what happens if we multiply with the Kronecker-Delta: \sum_{j=1}^{n} \delta_{ij} c_j = \delta_{i1} c_1 + \delta_{i2}c_2 + \dots +...