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Apple introduced the iMac G4/800 on January 7, 2002. The total cost was about $2000 (base price of $1799 plus RAM upgrade). The iMac G4/800 has an 800 MHz G4 processor. The G4/800 has the following ports: three USB 1.1 ports, two Fire Wire 400-Mbps ports, one RJ-45, 10/100BASE-T Ethernet port, one RJ-11 56K V.90 modem port, one Mini-VGA output port, one speaker jack, and one headphone jack. There is a built in microphone set on the front of the monitor in the bottom left corner. There is a single internal SuperDrive capable of reading and writing CDs and DVDs. The disk drive is on the front of the computer. It opens by pushing the disk drive button on the iMac's keyboard. The monitor size is 15 inches. The G4/800 has a NVIDIA GeForce2 MX graphics processor with AGP 2X support that provides 32 MB of dedicated Double Data Rate (DDR) video memory. Native resolution is 1024 x 768, but the built in monitor is also capable of 640 x 480 and 800 x 600. RAM can be changed by removing a panel on the bottom of the chassis. This iMac is AirPort ready but does not have an AirPort Card installed. The internal hard drive is 60 GB. The G4/800 has a small internal speaker.

Reflections and calculations on the fundamental field as a 4x4 matrix $\Psi$ and on a Lagrangian invariance against transformationLetter

Pauli's withdrawal of "On the Isospingroup in the Theory of Elementary Particles". Renounce to publish a common paper with Heisenberg on the subject.Manuscript

Notes and calculations on parity violation and isospin conservation.Calculations

Notes on a New York talk (Lee model, S-matrix, Hilbert space).Notes

Notes, probably on Heisenberg's manuscript "2) Boseteilchen der Ruhmasse Null".Notes

Calculations.Calculations

Calculations.Calculations

Heisenberg is happy to see that he and Källén agree on some mathematical points (S-Matrix, Hilbertraum I, Lee-Model).Letter

Representation of group U.