The IT Crowd Updated +Created
Video 1.
Anti-Piracy Ad by The IT Crowd (2007)
Source.
Chemical element Updated +Created
Chemical substance Updated +Created
Chemist Updated +Created
Differential equation Updated +Created
Infinitesimal Updated +Created
Just use limit instead, please. The French are particularly guilty of this.
Limit (mathematics) Updated +Created
The fundamental concept of calculus!
The reason why the epsilon delta definition is so venerated is that it fits directly into well known methods of the formalization of mathematics, making the notion completely precise.
Reproduction Updated +Created
WEHI Updated +Created
Poor renaming choice.
Cold Spring Harbor Laboratory Updated +Created
A hot hot place.
Good book Updated +Created
Howard Hughes Medical Institute Updated +Created
List of board games Updated +Created
WordPress Updated +Created
Medical Research Council Updated +Created
B6 Oxford physics course Updated +Created
users.ox.ac.uk/~corp0014/B6-lectures.html gives a syllabus:
Problem set dated 2015: users.ox.ac.uk/~corp0014/B6-materials/B6_Problems.pdf Marked by: A. Ardavan and T. Hesjedal. Some more stuff under: users.ox.ac.uk/~corp0014/B6-materials/
The book is the fully commercial The Oxford Solid State Basics.
Bacterial conjugation Updated +Created
Bad Stack Overflow policies Updated +Created
Ciro Santilli's hardware / Bicycle locks Updated +Created
December 2023: found the keys for the Kryptonite Kryptolock and the Abus in the house, so now I've got backup!
2023 lost one of the two keys to Kryptonite Kryptolock and to the Abus padlock:
2018 Kryptonite Kryptolock. Looks like: www.kryptonitelock.com/en/products/product-information/current-key/002031.html Includes Transit Flexframe-U Bracket carrier
2017 Abus Sinus Plus 471/150 HB U-lock. Sample seller with image: www.lockshopdirect.co.uk/products/abus-sinus-plus-471-d-lock-230mm-shackle-62620/
2017 an Abus chain and padlock, can't see marking easily. Chain length: 82cm.
Baker-Campbell-Hausdorff formula Updated +Created
Solution for given and of:
where is the exponential map.
If we consider just real number, , but when X and Y are non-commutative, things are not so simple.
Furthermore, TODO confirm it is possible that a solution does not exist at all if and aren't sufficiently small.
This formula is likely the basis for the Lie group-Lie algebra correspondence. With it, we express the actual group operation in terms of the Lie algebra operations.
Notably, remember that a algebra over a field is just a vector space with one extra product operation defined.
Since a group is basically defined by what the group operation does to two arbitrary elements, once we have that defined via the Baker-Campbell-Hausdorff formula, we are basically done defining the group in terms of the algebra.

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