More graves in Berlin

While in Berlin, I couldn't help but looking for more famous physicists. And in this case, I got a mathematician, too. I went to the St Matthäus Kirchhof where Gustav Kirchhof, of Kirchhof's Laws (both electrical and thermodynamic) is buried. I was a little confused as to why the cemetery had the same name as the person, but Kirchhof just means 'churchyard', so it was the St Matthäus churchyard cemetery. Unfortunately, I never found Kirchhof's grave, so you'll have to be content with a photo of the impressive entrance arch.

Entrance to the St Matthäus Kirchhof cemetery.

I did, however, find Leopold Kronecker's grave, along with his wife, Fanni. Kronecker, was a 19th century mathematician who is credited with the quote, "God made the integers, all else is the work of man." In physics his name often comes up in reference to the Kronecker delta symbol, δ_ij, where the subscripts i and j typically take on the integer values 1, 2, 3, and the value of the Kronecker delta is equal to 1 if i = j, and is equal to 0 if they are not equal. 

Grave site of Leopold Kronecker, mathematician

Kronecker is also related to me academically (or rather I am related to him). If you go to the Mathematics Genealogy project, the picture of the "tree" shows Dirichlet, who was Kronecker's advisor. I, on the other hand, am "descended" from Dirichlet through Lipschutz, Klein, Lindemann, and Sommerfeld.