How to reach me


Please visit the PANDA page of the course you are enrolled in, then use either

  • the forum (any time),
  • the anonymous question or feedback form (any time), or
  • the chat (time slots announced there).

I'm subscribed to all course forums and feedback forms, so will be notified as soon as you ask a question there.


  • (PGP public key)
  • Enrolled in a course with me? Please use PANDA (see above) instead of sending an e-mail if you can.
  • If you received an e-mail from a address (,, or similar) claiming to be me and asking for an urgent favor (“Please I need your assistance urgently”, “I need a favor from you right now”, or similar), you are witnessing an attempted scam. Please see, e.g., the E-Mail Alert page of Brown University for how the scammer is likely intending to continue.

Visitor Address

We're working from home.

Postal Address

Christoph Sommer
EIM-I CMS, Univ. Paderborn
F├╝rstenallee 11
33102 Paderborn, Germany

Times of Unavailability

Regular Duties (lectures, seminars, ...)

  • Wednesdays, 9-13h, 15-17h
  • Fridays, 9-12h

Extended Travel (conferences, meetings, ...)

  • April 2020: 1-3, 8-10, 13, 23-24, 30
  • May 2020: 1, 21-22
  • June 2020: 10-12
  • July 2020: 3



We're working from home.

E-Mail Address History

I have discontinued the use of a number of e-mail addresses. Please use my canonical e-mail address (at the top of this page) to contact me.

Do not use these outdated e-mail addresses.

  • (current address: see top of page)


Please see our group's contact page for more information