Recent content by pbuk

  1. P

    Taylor's Theorem for finding error for Taylor expansion

    Your first mistake here is not writing down and taking care with your workings: I am sure that you know that the second term of ## E_2(x) ## is ## f'(a)(x-a) = \frac{1}{2\sqrt a}(x-a) ## and a = 9 so why have you written ## \frac{1}{\sqrt 8}(x-9) ##? Next you are getting lost here in the theory...
  2. P

    A Mapping and Recovering Combinations: A Challenge in Combination Theory

    What a strange thread. The OP asked exactly the same question 7 months previously, and was given the answer 24 hours later that they needed to search for "combinadics". By looking back at your own thread? I don't know why I bother :wink:
  3. P

    I Excel projectile trajectory

    Ah sorry, I should have been clearer. In solving similar problems I have always solved for a difference of zero by using Data -> What-If Analysis -> Goal Seek. I do this because I have always done it this way and I wondered if you had experience that showed any option within the Analysis Tool...
  4. P

    I Excel projectile trajectory

    Is your recommendation of this rather than simply MAX(Y_POS) - TARGET_MAX_Y_POS based on experience?
  5. P

    I Understanding the given transformation - PDE

    Also, due to a quirk of the ## \LaTeX ## implementation, the Unicode character ∅ is translated to the symbol \emptyset which renders as ## \emptyset ##: if you want a character that looks like ∅ you need to use \varnothing: ## \varnothing ##.
  6. P

    I Questions about paper "How closed is cosmology"

    Then you should be familiar with the meaning of unbounded in this context. I believe this was first used by Einstein in the title of Chapter 31 of Relativity: The Special and General Theory (1920): 'The Possibility of a “Finite” and Yet “Unbounded” Universe'. Edit: the original German title of...
  7. P

    I Understanding the given transformation - PDE

    Maybe, but the way to do this is to use a symbol that represents phi to represent phi, not a symbol that represents the empty set. The fact that sometimes this symbol looks a bit like some representations of phi is irrelevant. It's like writing the equation for the circumference of a circle as 2🥧r.
  8. P

    I Understanding the given transformation - PDE

    The symbol ## \phi ## is called "phi" and is entered in ## \LaTeX ## as \phi (##\phi##). The Unicode character ∅ represents the empty set and should not be used as a substitute for ## \phi ##.
  9. P

    B Filming a passing road sign: speed vs bumpiness

    It's 2024. Using a GoPro (other action cameras are available) will eliminate almost any uneven motion, and modern video editing software will slow down or speed up the clip by any amount you want smoothly, especially if you film at 4x.
  10. P

    I am confused about air density/drag

    What causes drag? At a given speed is the drag the same at different altitudes?
  11. P

    Flipped RGB colours in a TV

    I have found a document that answers all these questions about Television Centre and more: http://www.tech-ops.co.uk/tech_guide.pdf (sorry about the hijack). In summary: There was indeed a central sync generator in the CAR which was fed to each studio. Feeds from each studio went to the CAR...
  12. P

    Flipped RGB colours in a TV

    And was switching between studios preserving frame sync really ever done? How were the signals generated by the cameras in different studios synced in the first place?
  13. P

    Flipped RGB colours in a TV

    Oh there is no doubt about the basement under the fountain (later replaced by the statue), and the video recording suite being located there. However the Central Apparatus Room was on the second floor of the 'central wedge' of the doughnut: are you saying that cables from studios 3 and 4...
  14. P

    Flipped RGB colours in a TV

    I am not sure that is correct, do you have any source for that (other than the spurious information on Wikipedia, which I have removed)?
  15. P

    Ipad M4 11" or Galaxy Tab S9 Ultra?

    No, but many things are buggy if you use Safari. Overleaf should be OK in Chrome or Firefox although see https://www.overleaf.com/learn/how-to/Can_I_use_Overleaf_on_my_iPad%2C_Android_tablet%2C_or_other_mobile_devices%3F It is. You can buy a lot of replacement pens for a Surface for that...
Back
Top