# This is the main index
These are notes for the [University of Alberta MATH 201 - Differential Equations](https://apps.ualberta.ca/catalogue/course/math/201) course.
I have written these notes for myself, I thought it would be cool to share them. These notes may be inaccurate, incomplete, or incoherent. No warranty is expressed or implied. Reader assumes all risk and liabilities. 
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[Separable equations (lec 1)](separable-equations-lec-1.html)
[Homogenous equations (lec 2)](homogenous-equations-lec-2.html)
[Linear equations (lec 2-3)](linear-equations-lec-2-3.html)
[Bernoulli equations (lec 3)](bernoulli-equations-lec-3.html)
[Linear coefficient equations (lec 4)](linear-coefficient-equations-lec-4.html)
[Exact equations (lec 4-5)](exact-equations-lec-4-5.html)
[Second order homogenous linear equations (lec 5-7)](second-order-homogenous-linear-equations-lec-5-7.html) 
[Method of undetermined coefficients (lec 8-9)](method-of-undetermined-coefficients-lec-8-9.html)
[Variation of parameters (lec 9-10)](variation-of-parameters-lec-9-10.html) 
[Cauchy-Euler equations (lec 10-11)](cauchy-euler-equations-lec-10-11.html)
[Reduction of order (lec 11)](reduction-of-order-lec-11.html)
[Free vibrations (lec 11-12)](free-vibrations-lec-11-12.html) 
[Resonance & AM (lec 13-14)](resonance-am-lec-13-14.html)
[Laplace transform (lec 14-16)](laplace-transform-lec-14-16.html)
[Solving IVP's using Laplace transform (lec 17-18)](solving-ivps-using-laplace-transform-lec-17-18.html)
[(Heaviside) Unit step function (lec 18)](heaviside-unit-step-function-lec-18.html)
[Periodic functions (lec 19)](periodic-functions-lec-19.html)
[Convolution (lec 19-20)](convolution-lec-19-20.html)
[Dirak δ-function (lec 21)](dirak-δ-function-lec-21.html)
[Systems of linear equations (lec 21-22)](systems-of-linear-equations-lec-21-22.html)
[Power series (lec 22-25)](power-series-lec-22-25.html)
[Separation of variables & Eigen value problems (lec 26-28)](separation-of-variables-eigen-value-problems-lec-26-28.html)
[Fourier series (lec 28-29)](fourier-series-lec-28-29.html) (raw notes, not reviewed or revised yet.)
[Partial differential equations (lec 30-33)](partial-differential-equations-lec-30-33.html) (raw notes, not reviewed or revised yet.)
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[How to solve any DE, a flow chart](Solve-any-DE.png) (Last updated Oct 1st, needs revision. But it gives a nice overview.)
[Big LT table (.png)](drawings/bigLTtable.png)
[Small LT table (.png)](drawings/smallLTtable.png)
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