Sad news

[Eric Smith]

Chris Bunsen has passed away. Chris worked on design and firmware for various HP calculators, and was awarded patents on a number of innovations.

http://www.gazettetimes.com/news/local/obituaries/christopher-m-bunsen/article_cbe0b28c-6f66-11e2-83c4-0019bb2963f4.html

[db (martinez, ca.)]

....wrote HP Solve, played the Tiple, could deliver a baby, known for his cooking.... He sounds like he could have been the model for the man in Heinlein's quote Specialization is for Insects.
It's too late but, thanks Mr Bunsen.

[Mike (Stgt)]

He did HP-Solve? Hope he left at least some write ups about it. HP-Solve is - not only for me - a milestone.

Sad.....Mike

[Namir]

Wow, Chris was behind the implementation of HP Solve???!! Sad day for algorithm loves like myself. Chris you are the man!!

Namir

[Gerson W. Barbosa]

Chris Bunsen was behind the HP Solve user interface of the HP-18C and subsequent calculators:

http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1987-08.pdf ( History and Inspiration of the Solve Interface, by Chris M. Bunsen, can be found at page 10)

The SOLV key, a primary function on the HP-28S, was one of the things that impressed me back in the day. Still today a joy to use!

The algorithm itself was based upon Prof. Kahan's, I think:

http://www.eecs.berkeley.edu/~wkahan/Math128/SOLVEkey.pdf

It's really bad news when a creative and active mind goes away unexpectedly. Rest in peace, Mr. Bunsen!

Gerson.

[Namir]

In a direct communication with professor Kahan to inquire about the details of the Solve algorithm, he mentioned that as master's student was working on it. What was Chris's involvement? I don't know. Does anyone have more insight?

[hpnut]

I remember the menu implementation on the HP 41CX. thanks for your work, Chris.

RIP.

[Eddie W. Shore]

RIP Mr. Bunsen. Thank you for everything. Condolences and comfort to the family.