I saw the sentence "by the time token" in a physics textbook. The original sentence is:

By the time token, if E < V(and V is constant), then Y is exponential.

In Cambridge Dictionary, "token" means "symbol", but obviously it doesn't suit the context here. Can anyone please explain what the phrase means?

  • 2
    Doesn't the book mention such a token earlier in the paragraph or chapter? – Tᴚoɯɐuo Dec 12 '17 at 13:16
  • 6
    Difficult to say without more context. It's possible that what they meant to say was by the same token, but just made a mistake and wrote by the time token instead. – Michael Rybkin Dec 12 '17 at 13:27
  • 1
    Try checking the index at the back of the textbook, there's a pretty good chance it has one. If you're still struggling, I'll be more than happy to answer. – Tyler Dec 12 '17 at 13:30

I'm going to go with Cookie Monster on this one and suggest it's a misprint. The common expression is "by the same token", meaning "in the same way".

If I leave my house at 5 in the morning, I can beat the traffic and get to work in half an hour. By the same token if I leave work before 3, I can get home in the same amount of time.

It's possible that "time token" has a specific meaning in the textbook, which would have been earlier defined, but there isn't enough context in your example to be sure.

  • I suspect you are correct. A quick Internet search located this quotation in Introduction to Quantum Mechanics by D.J. Griffiths at the top of page 316. pd.infn.it/~zwirner/WKB-1-2.pdf – joiedevivre Dec 12 '17 at 22:10
  • @joiedevivre Yes, you are correct. I was reading Griffths's Introduction to QM and there's a misprint in my book. Thanks:) – Dennis Dec 13 '17 at 10:45

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.