Join the discussion
Registration is free. Ask a follow-up in this thread, or start your own.
4,104 replies · 526K views
Physics news on Phys.org
Science Advisor
Homework Helper
- 3,447
- 3,739
Attachments
Science Advisor
Homework Helper
- 3,447
- 3,739
Attachments
Mentor
- 37,541
- 14,421
Can be used for entertainment, but also as weapon against the launch pad[/size].
- 20,819
- 28,467
I thought for impact defense!mfb said:Can be used for entertainment, but also as weapon against the launch pad.
Science Advisor
- 14,916
- 7,622
- 13,923
- 16,801
That's really difficult to look at. It's so clearly a spiral, even once you've worked out it isn't.Demystifier said:When you use a circular argument, but you are unable to see where exactly your logical error is.
View attachment 224696
Bikash Kumar Das
- 7
- 2
[emoji16][emoji16]
256bits
Gold Member
- 4,284
- 2,297
The rings are slowly rotating in opposite directions.
Science Advisor
- 14,916
- 7,622
Science Advisor
- 14,916
- 7,622
This would be in another dictionary, because even most mathematicians see category theory as abstract nonsense.nuuskur said:abstract nonsense = category theory
Last edited:
Science Advisor
- 14,916
- 7,622
- 20,819
- 28,467
Perfect! And I finally understood the co- / contravariant usage by physicist, because the proper usage in category theory ...Demystifier said:
I would have changed the classical section a bit:
basic operations = commutative algebra
classical field theory = Galois theory
field = real or complex numbers
mathematical analysis = calculus
measure theory = analysis
I herewith propose this image (1st one) as fb ad for PF!
Last edited:
Keith_McClary
- 752
- 1,507
Keith_McClary
- 752
- 1,507
When the TURBO feature was discontinued, the cases used by the local builders still came with the button and display, so obviously they had to hook up the display, even though the button didn't do anything.jack action said:turbo button! ... After pushing the button and noting no differences, you pushed it again, wondering if it was working.
Attachments
- 20,819
- 28,467
Just for the greenhorns: these numbers did not represent GHz.Keith_McClary said:When the TURBO feature was discontinued, the cases used by the local builders still came with the button and display, so obviously they had to hook up the display, even though the button didn't do anything.
View attachment 225062
Btw., do young people still know what a jumper is?
OCR
- 996
- 936
Well, you're real close, but not quite correct... . 
The last pickup to leave the parking lot... . "when it's cold outside."
Lol... .

In Montana, a jumper is...DrClaude said:Nah, they just it's something you put on when it's cold outside.
The last pickup to leave the parking lot... . "when it's cold outside."
Lol... .

Mentor
- 38,152
- 10,759
And man alive, it does get cold there. I saw the bank thermometer in Lolo, MT one evening showing -39. That's the "banana belt," as they call it around there, so called because it's warmer than, say, Havre, up on the Highline.OCR said:In Montana, a jumper is...
The last pickup to leave the parking lot... . "when it's cold outside."
BTW, for our more cosmopolitan friends, -40 F = -40 C, so when it's -39 out, it doesn't matter much which scale you're measuring by ...
Science Advisor
- 14,916
- 7,622
Chuck Norris can count real numbers.
Chuck Norris can shave all those and only those who don't shave themselves.
Chuck Norris can prove the Banach-Tarski theorem - by explicit construction.
Chuck Norris can prove his own consistency without being inconsistent.
Chuck Norris can shave all those and only those who don't shave themselves.
Chuck Norris can prove the Banach-Tarski theorem - by explicit construction.
Chuck Norris can prove his own consistency without being inconsistent.
hyunxu
- 54
- 16
Science Advisor
- 3,381
- 2,936
We have a bell button on the gate. We never had an actual bell, but we have a button anyway.Keith_McClary said:When the TURBO feature was discontinued, the cases used by the local builders still came with the button and display, so obviously they had to hook up the display, even though the button didn't do anything.
When somebody coming and there is no button, they tends to get nervous and start shouting inside if we are at home or not.
Since there is a button, they just push it a few times and then calmly go away.
So that button has a significant contribution to the overall calmness of the world.
DennisN
Gold Member
- 2,197
- 10,328
Similar threads
- DennisN
- · Replies 17 ·
- Science Fiction and Fantasy Media
- Replies
- 17
- pivoxa15
- · Replies 36 ·
- General Discussion
- Replies
- 36
