Ciro Santilli @cirosantilli 40

In the Galilean transformation, there are two separate invariants that two inertial frame of reference always agree on between two separate events:

However, in special relativity, neither of those are invariant separately, since space and time are mixed up together.

Instead, there is a new unified invariant: the spacetime-interval, given by:

Note that this distance can be zero for two events separated.

He used to train the 800,000 imperial guard troops at the Capital, much like Lin Chong. He's not one of the 108 Stars of Destiny.

Chanbara (チャンバラ).

Those movies are "all the same". A quasi lone superhuman samurai with a good inside but painful problems helping out random people, mostly villagers in trouble and bitches in debt.

Group of rotations of a rigid body.

Like orthogonal group but without reflections. So it is a "special case" of the orthogonal group.

This is a subgroup of both the orthogonal group and the special linear group.

Largest programs ever written:

DokuWiki about physics, mostly/fully written by Jakob Schwichtenberg and therefore focusing on particle physics, although registration might be open to all.

Most commonly, boundary conditions such as the Dirichlet boundary condition are taken to be fixed values in time.

But it also makes sense to think about cases where those values vary in time.

Some bibliography:

users.physics.ox.ac.uk/~lvovsky/B3/ contain assorted PDFs from between 2015 and 2019

Syllabus reads:

Professor in 2000s seems to beBut as of 2023 marked emeritus, so who took over?

Ewart is actually religious:This dude is pure trouble for Oxford!

Undated materials Ewart:

2026-02: www.amazon.co.uk/dp/B0FCWSVXM8 "DCA Cordless Drill Set, 40 N.m Torque, 10mm Keyless Chuck, Electric Power Drill with 2.0Ah Battery and Charger,18+1 Position,35-Piece 20V Drill Driver Kit, ADJZ2035". Finally had to buy a drill set for some bloody Ikea furniture that needed drilling. OMG. Then it didn't have the necessary 7,00 mm wood drill bit, they were not documented by seller, but I bought one from Bosch and it was compatible and I managed to put up the bloody Ikea. Drill bit sizes:The included screw bits are:

2020-01 www.amazon.co.uk/dp/B07D318N7Z BOENFU 12Pcs iPhone Repair Tool Kit Mobile Phone Screwdriver Set with LCD Opening Pliers Cell Phone LCD Screen Opener Suction Opening Pry Tool Kit for iPhone X/5s/6s/6plus iPad Air iPod Samsung Galaxy

2020-01 "Heat Gun, SEEKONE Professional 2000W 50℃- 600℃ Variable Temperature Control Hot Air Gun Kit with 2 Temperature Modes 7 Accessories for D" www.amazon.com/dp/B078S5QMFG Initially for for cell phone repair, but later learnt they are also useful for heat shrink.

2020-11 BOA 13-2612 Strap Wrench, 6-Inch Capacity 8-Inch Long Lever www.amazon.com/dp/B00096JDKS Official: www.boatoolcorp.com/our-products/boa-constrictor-range/boa-constrictor/

2019-09 "Draper Redline 68001 160 mm Heavy Duty Pliers Set with Soft Grip Handles (3-Piece)" web.archive.org/web/20190903191215/https://www.amazon.co.uk/dp/B071JL6LLL (archive)

2019-08: www.amazon.co.uk/dp/B000LFRYG2 (archive) "Silverline SP1236 Combination Spanner, 8-19 mm - 12 Pieces" 8.48 pounds. Because I needed the 15mm for bike pedal, and the price of 1 and the full set were very close.

6 10/11/12/13/14/17 mm Combination Wrench Set WRENCH SET COMBINATION Open-Ended Spanner/Ring Spanner Set www.amazon.co.uk/dp/B07BZLVGX8 (archive) But they sent one wrong, 8 instead of 11. Chrome Vanadium Steel. Markings: "DROP FORGED A". Quality feels crappy, not very smooth.

2017: Teng 621011 Double Open Ended Spanner 10x11mm www.amazon.co.uk/dp/B0001P0VP8 (archive)

2017: Magnusson AMS49 5M TAPE MEASURE 5m retractable flexible rule. www.screwfix.com/p/magnusson-ams49-5m-tape-measure/5315v (archive)