Using rectangular regions over the graph of the  reciprocal function, the image illustrates that the harmonic numbers are bounded below by the natural logarithm, thereby establishing the divergence of the harmonic series.

Welcome to my website

I am a mathematics faculty member at Waubonsee Community College. If you are looking for my current teaching schedule or for my class web pages, please click on the class information link above. For old class material, click on the archives link.

Contact Info

Office: BDE 249
Phone: (630) 466-6698
E-mail: skifowit 'at' waubonsee 'dot' edu

Fall 2021 Office Hours

Sugar Grove Campus, BDE 249, TTh 11:30am-12:30pm
Aurora Downtown Campus, DWNTN 356, MW 1pm-2pm
Zoom, M 6:30pm-7:30pm