Recent content by DrGreg

Yes, but according to Wikipedia, the U.S. system is different from the European system. Europe U.S. Russia 2B #0 2М B #1 M HB #2 TM H #3 T 2H #4 2T

Something similar happened in a pencil shop.

I'll probably join some time next month.

past infinitive = "(to) have" + past participle

While "she has written..." is the present perfect tense, which differs from the past tense as described in post #1, "she should have written..." is not. It is composed from the past tense "should" of the modal auxiliary verb "shall" combined with the past infinitive "(to) have written"...

To be pedantic the phrase should really be "proper fraction of the cost".

Opinion is divided.

Former UK prime minister Boris Johnson was yesterday turned away from a polling station when he could not prove his identity. It was his own government that two years ago introduced legislation requiring voters to show photo ID. BBC: Boris Johnson turned away from polling station after...

The subtraction makes no sense. It's as if you are trying to subtract 3 cats from 5 dogs and don't understand why an answer of 2 is wrong. It makes no sense to subtract ##Y_\mu## from ##X^\mu## no matter what ##\mathbf{X}## and ##\mathbf{Y}## are. You did, but that's irrelevant to why the...

At least it didn't take you a degree.

That reminds me of the case of "Prawo Jazdy", a person who was listed on the Irish police computer system as someone who had committed numerous traffic offences using a variety of addresses. Until someone realised that "Prawo Jazdy" is Polish for "Driving Licence". See...

Could be the basis for a new version of "rock paper scissors".

That's easy for you to say...

I agree, there is an inconsistency in the notation.

I was brought up to use ##\sin^{-1}## etc. I think that might be a U.K. vs U.S. thing.