Maths

• What are order of magnitude calculations?

  A kind of estimate using standard form and comparing the exponents. You can then say how many times bigger or smaller one number is than another.
• Mathematical symbols:

  1. = equals sign = equality
  2. > strict inequality = greater than
  3. < strict inequality = less than
  4. >> inequality = much greater than
  5. << inequality = much less than
  6. ∝ proportional to = proportional to
  7. ≈ approximately equal = weak approximation