Grateful thanks to you all. Yes the problem was the 'I' in 'infinity' I should have typed 'Infinity' I think Mathematica treats the lower case as a variable where with the initial capital letter it recognises Infinity as, I was going to say a value, for what it is. Correcting that produced the expec...

I have been testing out Mathematica in Raspbian and typed this Sum[1/n^2,{n,infinity}] In English this should sum the reciprocals of the squares i.e. 1 + 1/4 + 1/9 + 1/16 + 1/25 + 1/36 etc The surprising result should be pi^2/6 However Mathematica returns HarmonicNumber[infinity, 2] Why does it not ...

That worked. The screen is showing a menu of setup options. Thanks for all your help.

Thanks all.

I am sudoing and dding. Certainly not very intuitive stuff. This link is helpful.

http://www.raspberrypi.org/documentatio ... ges/mac.md

Also needs to be used with care as I see I can over write my harddisk which I would rather not do!

Both red and green lights are on. Neither is flashing. I had the disk image of Raspbian and just copied it to the SD card. Have I erred? Does this also stop the TV displaying anything?

I am new to the RaspberryPi and this is the first time I have tried to get one to work. I have formatted the SD card put an image of Raspbian on the card. Connected a wireless keyboard and mouse and powered it up. There are two LEDs on, a red and green one. The HMDI cable is connected to the one of ...