# 104131 Winter 2017

Instructor: Prof. Nicholas Crawford, Amado 707, nickc@tx.technion.ac.il

Teaching assistant: Zilin Jiang, Amado 604, jiangzilin@technion.ac.il

Office hour for Zilin Jiang in Amado 604: Thursday 4:30PM – 5:30PM.

Announcement:

• I am traveling between December 20, 2017 and January 6, 2018. Another TA will substitute me for two recitations.

Recitations:

• Recitation 1: first-order ordinary differential equation (ODE) $y'=ay+b$, slope diagram, initial value problem (IVP). October 26, 2017.
• Recitation 2: integrating factor, separable equation, application of ODE. November 2, 2017.
• Recitation 3: exact equation and integrating factor, orthogonal families of curves. November 9, 2017.
• Recitation 4: existence and uniqueness (U&E). November 16, 2017.
• Recitation 5: second-order linear ODE with constant coefficients whose roots of characteristic equation are distinct reals. November 23, 2017.
• Recitation 6: second-order linear ODE with constant coefficients whose roots of characteristic equation are complex. November 30, 2017.
• Recitation 7: existence and uniqueness, Wronskian. December 7, 2017.
• Recitation 8: Wronskian and order reduction. December 14, 2017.
• Recitation 11: power series, series solutions of ODE. January 11, 2018.
• Recitation 12: systems first-order linear DE whose eigenvalues are distance reals, phase portraits. of  January 18, 2018.
• Recitation 13: systems of first-order linear DE whose eigenvalues are complex. January 25, 2018.
• Recitation 14: review session. February 11, 2018.