DiffyQ

Resources

• Current: The Laplace transform (pdf) has an example, a simplification of tapping on a bell. Also available is a small Table of Laplace transforms (pdf).
• Current: The useful Euler-Mascheroni constant and Gamma (pdf). See also W: Gamma fnc and Euler's constant. A place where the Polor-coordinate Trick is used, is the normalizing constant of the Gaussian distribution.
  For the curious: The Gamma fnc, and Volume of the n-ball (pdf).
• Quiz Xciting! will be available Tuesday, 20Apr2021, at 9AM, via Canvas.
• Current: Pamphlet N×N determinants (txt) gives examples, showing that the determinant of an NxN matrix is a degree-N homogeneous polynomial in N-squared many variables, with N-factorial many terms.
  The document now has an example of the trick for quickly computing the Det() of a 3x3 matrix. It also computes the Wronkskian of a list of three functions.
  (THe top of the document was written for an Algebra course, and has material we do not need.)
• Current: Delve into our DiffyNotes   (pdf).  [Sunday, 14Mar2021].
  DNotes now has an Unequal-height hanging-cable problem  (pdf) [currently P.35].
  Section Compartmental analysis is now Appendix D; please skim appendix D.
  Our next topic was Convolutions.
• Possibly: W:  FTODE, Picard-Lindelöf theorem.
• Wonderful W was everyone's favorite, as it answered that burning light bulb question...
  Happily, Wonderful W with solns is available. As always, corrections welcome.
• The Gentle quiz V [now with solutions], everyone agreed, was a  sinh !
• Mr. Spock appreciated the Logistical Quiz U, admiring the reference to his friend, Bernoulli, who`encourages folks to post solutions (not just answers) to our Archive.
  Whoa!, now we have all Curious U solns!
• The enthusiastically received Cool Quiz T allowed scholars to exhibit their polynomial-target skills. For your reading pleasure: Quiz T with solns.
• Spiffy Fun Quiz S elicited shouts of enthusiam. Admirers remarked on its clean lines, and efficient two-tone black-white format, marveling at the similarity of the CCLDE problem to what is in DiffyNotes.
  A Triumph!, concluded all the major newpapers, with customers clamoring for more DfyQ Knowledge...
• Past: Wikipedia: W:Complex number and W:Exponential function.
• Past: Practice: Binomials, complex arithmetic
• Past: The Math-Greek alphabet (pdf).
• Past: Learn the abbreviations on the first page of DiffyNotes.
• Past: W: (skim) ODE. W: (skim) Linear DE. W: SoV W:(skim) Differential Eqn.
• DfyQ syllabus  [Monday, 12Apr2021]