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  1. Main Page ‎(357,670 views)
  2. Create a Substepr user account ‎(50,162 views)
  3. Build an all-electric car ‎(19,652 views)
  4. Topics (listed alphabetically) ‎(19,561 views)
  5. Find the probability of a player being given exactly one ace in a Bridge deal ‎(19,443 views)
  6. Quantum field theory ‎(18,738 views)
  7. Create a new page in Substepr ‎(16,722 views)
  8. Use COMSOL Multiphysics to make a 2D simulation of Poiseuille flow ‎(14,088 views)
  9. Login to an existing Substepr user account ‎(13,216 views)
  10. Mathematics ‎(11,872 views)
  11. Find the distribution of the number of observations until the value of the first observation is exceeded. ‎(11,810 views)
  12. Calculate expectation values for \(x^4\) in state \(n\) using ladder operators ‎(10,019 views)
  13. Contribute to an existing page in Substepr ‎(9,566 views)
  14. Integrate using 'Integration by parts' ‎(9,521 views)
  15. How to get started with Substepr ‎(9,453 views)
  16. Find the probability that the larger of two iid samples exceeds the population median. ‎(8,281 views)
  17. Build the open source car suggested on www.theoscarproject.org ‎(7,639 views)
  18. Donor name or URL submission instructions ‎(7,303 views)
  19. A few words from the founder ‎(7,167 views)
  20. Contact us ‎(6,775 views)
  21. Physics ‎(6,596 views)
  22. Plan the construction of a modern-day pyramid as an open project hosted by Substepr ‎(6,477 views)
  23. Top donors ‎(6,447 views)
  24. Use the Trachtenberg speed system to multiply 98834 by 11 ‎(5,301 views)
  25. Use the Trachtenberg speed system to multiply 715624 by 11 ‎(5,246 views)
  26. Create something profound ‎(5,101 views)
  27. Trachtenberg speed system of basic mathematics ‎(4,996 views)
  28. Biology ‎(4,795 views)
  29. Show that the Holstein-Primakoff transformation satisfies the spin commutation relations ‎(4,733 views)
  30. Show that the scalar (or inner) product of position \(x\) and momentum \(p\) can be written as an exponential in terms of \(x\) and \(p\) ‎(4,543 views)
  31. Derive the equations of motion for a simple harmonic oscillator ‎(4,536 views)
  32. Use the Trachtenberg speed system of basic mathematics to multiply 443052 by 6 ‎(4,450 views)
  33. Use the Trachtenberg speed system to multiply 441362 by 11 ‎(4,413 views)
  34. Engineering ‎(4,356 views)
  35. Use the Trachtenberg speed system to multiply 413 by 12 ‎(3,995 views)
  36. Show that if the lowering operator acts on a non-zero eigenstate of the number operator, the result is also an eigenstate of the number operator ‎(3,898 views)
  37. Find a fossil ‎(3,897 views)
  38. Calculate expectation values for \(x^2\) in state \(n\) using ladder operators ‎(3,893 views)
  39. Quantise the coupled harmonic oscillator ‎(3,884 views)
  40. Use the Bogoliubov transformation to diagonalise the BCS superconductivity Hamiltonian ‎(3,872 views)
  41. The Top Donors list ‎(3,804 views)
  42. Chemistry ‎(3,798 views)
  43. Make a humanoid robot that can sprint faster than a human ‎(3,669 views)
  44. Computer science ‎(3,596 views)
  45. Build a Reprap 3-dimensional printer ‎(3,499 views)
  46. Use the mean field approximation to simplify the BCS superconductivity Hamiltonian ‎(3,478 views)
  47. Make replica plates of a particular Petri dish ‎(3,421 views)
  48. Show that the bosonic commutation relations of the creation and annihilation operators are preserved by the Bogoliubov transformation ‎(3,355 views)
  49. Derive the variance of a uniform distribution. ‎(3,354 views)
  50. Top users ‎(3,271 views)

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