Differential Equations II

Resources for Differential Equations II聽- for more information about the course, please see聽course outlines.

MLC Drop-in centre

Students from Differential Equations聽II can use the聽drop-in centre, but we will give priority to first year students. If you see every other table has students, then we would appreciate it if you found another place to sit so that there is room for new students.

Please note that not every staff member in the MLC knows all of the content in DE聽II, there will be times when we can only give general study advice for this course.

Assumed knowledge

These resources cover content that is assumed before you begin Differential Equations II.

  • Integration

    In order to solve differential equations, you will need to be really comfortable with performing integrals. These resources from Maths IA should help you revise.

    These three PDF handouts are useful for doing different types of integration:

    This PDF document contains many written worked examples of various techniques of integration.

    This seminar was given in for Maths 1A Sem 1 2021 and covered the techniques of integration (substitution, by parts, trig substitution, partial fractions and upper and lower sums).

    • (No notes available for 2021 semainrs)

    This seminar was given for Maths 1A聽in Sem 1 2014 and covered the entire of the techniques of integration topic. (Note that the seminar also includes reduction formulas and numerical integration,聽which are no longer in Maths 1A and you won't need for DEs for Engineers.)

  • Partial derivatives

    You will occasionally need to do partial derivatives in this course. This Maths IB seminar from 2012 had a section about partial derivatives starting at 18m16s:

  • Eigenvectors and eigenvalues

    While solving systems of linear ODEs, you will need to find the eigenvalues and eigenvectors of matrices. These resources will help revise that process.

    This PDF handout list various facts about eigenvalues and some examples of classic problems using them.

    This seminar from 2012 covers eigenvalues and eigenvectors for matrices (it was given for students in Maths 1A but this topic has now been moved to Maths 1B).

    This seminar for Maths 1B from Summer Semester 2020 started with a section on eigenvectors.

    • (No notes available from 2020 seminars)

  • Infinite series

    A section of this course will use infinite series techniques to solve differential equations. These resources will help to revise the skills you need.

    This seminar for Maths 1A聽Sem 1 2016 discussed how sum notation works, the rules for how it interacts with other operations, and some of the special manipulations you can do with it.

    This seminar for Maths 1B聽in Summer Semester 2019 ended with a section on infinite series examples (starting at 1h30m), and it contains most of the skills you need for DEs.

  • Differential equations

    This course begins where the differential equations content from Maths IB leaves off. These resources will help you revise the differential equations from Maths IB.

    This seminar for Maths IB from 2014 covered various topics on differential equations, including first order separable equations, integrating factors, second order linear equations and the logistic equation. In this seminar, there was a Prezi presentation showing the process of solving linear second order differential equations. There is a link below to a PDF handout version.

    This seminar for Maths IB from 2023 covered second order linear (constant coefficient) differential equations, including finding the general solution to homogeneous equations via the characteristic equation, and finding a particular solution to a non-homogeneous equation.

    In this seminar for Maths IB from Semester 2 2018, the first part covered phase diagrams for differential equations. There was a Desmos graph that David showed in this seminar, which there is a link to below.

    Revision Seminars in order of time

    Note: The course Differential Equations聽II has content that is similar to the course Differential Equations for Engineers II, which replaced the old course Engineering Maths IIA. Some revision seminars for DEs for Engineers and Engineering Maths IIA have also been included below.

    2023

    In Semester 1 2023, David gave a revision seminar for Differential Equations II students where he discussed bifurcation points and then PDEs. Unfortunately the video was corrupted so only the first half an hour on bifurcations is able to be watched. However the notes from both parts are available below.

    Since the above seminar video was corrupted, David recorded a short worked example on how to hand-draw a bifurcation diagram for an autonomous differential equation with an unknown parameter.

    Also in Semester 1 2023, David gave a revision seminar for a different course, Differential Equations for Engineers trying to organise all the methods of solving DEs and PDEs in the course. The list of methods isn't exactly the same in the two courses, but it still might be useful for you. There is also a handout organising the various methods for ODEs in one place.

    Also in Semester 1 2023, David gave a seminar for both DEs II and DEs for Engineers simultaneously.聽David discussed systems of ODEs (at the start), and the Frobenius method (starting at 1h5m).

    2022

    This revision seminar was given for students聽of Differential Equations II. David discussed linear differential equations, including linear constant coefficients, the method of undetermined coefficients, the method of reduction of order, and the method of variation of parameters.

    2021

    This revision seminar was given for students in Differential Equations II in Semester 1 2021. David discussed Fourier series, including those with different periods, and half-range expansion, and also generalised series.

    • (No notes available for 2021 seminars)

      2020

      This revision seminar was given for students in Differential Equations for Engineers II in Semester 1 2020.聽David talked briefly about Fourier series and also went through an example of solving a PDE using separation of variables.

      • (No notes available for 2020 seminars)

      2019

      This is a revision seminar given to students in Differential Equations II in Semester 1 2019. David discussed the Frobenius Method, and solving a heat equation using separation of variables (at 1h2m20s), with a very quick discussion of existence and uniqueness of solutions at the end.

      This revision seminar was given for students from Engineering Mathematics IIA in Semester 1 2019. David discussed the following:

      1. Finding particular solutions to DEs using Undetermined Coefficients and Variation of Parameters
      2. Choosing which statistical test goes with your situation - NOT PART OF Differential Equations II, of course!
      3. Converting from complex fourier coefficients to ordinary ones (starting 1h45m27s)
      4. Power series methods for differential equations (1h58m13s)

      2018

      This revision seminar was given to students聽Differential Equations II in Semester 1 2018. David聽covered power series solutions for linear differential equations, including the Frobenius method (20m6s), and also an example of coming up with a system of differential equations (1h20m32s).

      2017

      This revision seminar was given for students聽Engineering Maths IIA in Semester 1 2017. David covered systems of linear differential equations with matrices at the start. (The end of the seminar is about linear regression, which is not part of DEs II!)

      2016

      This revision seminar was given to students in聽Engineering Maths IIA in 2016. It covered one big example of solving a PDE using separation of variables, including specific discussion of the Sturm-Louiville Problem.

      This revision seminar was given to students in Engineering Mathematics IIA in 2016. David did several examples of calculating Fourier coefficients both for full-range and half-range expansions. Also David showed how to draw odd and even extensions of functions.

      2015

        This revision seminar was given to students in Engineering Mathematics IIA in 2015. It covers one big example of solving a PDE using separation of variables, with some what-if scenarios at the end to discuss how it might have come out differently.

        This revision seminar was given to students in聽Engineering Maths IIA in 2015. It covers solving systems of linear ordinary differential equations.

        2014

        This revision seminar was given to students in Engineering Mathematics IIA in 2014. David covered various exam questions about substitution for differential equations (5m34s), power series and the Frobenius method (20m18s), and separation of variables (1h5m5s).

        2013

        This revision seminar was given to students in聽Engineering Mathematics IIA in 2013. It covered a general summary of the methods and concepts in differential equations, the method of variation of parameters (23m), odd/even extensions of functions for fourier series (58m23s), the method of undetermined coefficients (1h3m55s), and singular points and Frobenius' method (1h22m15s).