"Preview" for Tuesday. Update: and for Wednesday

Tuesday: review part on screen. Cookbook on screen. Keep cookbook on screen and give examples on the board. Might supplement this with handwritten examples afterwards.

/studier/emner/sv/oekonomi/ECON4120/h18/lecturenotes/econ4120LecDifferentialsEqSystems-preview.pdf

Draft for Wednesday uploaded as well: 
/studier/emner/sv/oekonomi/ECON4120/h18/lecturenotes/econ4120LecElastSubst-preview.pdf