This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
seminar on differential equations and integration theory seminarondifferentialequationsandintegrationtheory institute of mathematics as cr instituteofmathematicsascr jaroslav kurzweil jaroslavkurzweil kurzweil integral kurzweilintegral seminar mathematics people indoor Seminar on Differential Equations and Integration Theory Seminar