Turn on thread page Beta
    • Thread Starter
    Offline

    3
    ReputationRep:
    Hey,

    The scalar product is so called because it produces a scalar, a real number which could potentially be negative.

    I always thought a scalar was a positive number or 0; apparently this is not so.

    Why can a negative number be a scalar when the negative sign implies, to me at least, the involvement of direction?

    Thank-you.
    Offline

    10
    ReputationRep:
    That's not the meaning of scalar outside school physics. A scalar is just a real or complex number that can be used to scale a real or complex vector.
    • Thread Starter
    Offline

    3
    ReputationRep:
    (Original post by Zhen Lin)
    That's not the meaning of scalar outside school physics. A scalar is just a real or complex number that can be used to scale a real or complex vector.
    Okay that would explain it. Thank-you.

    What do you mean by scale? An enlargement which can be negative (i.e. flip the vector)?

    Also, what is a complex vector? If it is too complex (I know about complex numbers) there is no need to explain it to me.
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: March 21, 2011

University open days

  1. University of Bradford
    University-wide Postgraduate
    Wed, 25 Jul '18
  2. University of Buckingham
    Psychology Taster Tutorial Undergraduate
    Wed, 25 Jul '18
  3. Bournemouth University
    Clearing Campus Visit Undergraduate
    Wed, 1 Aug '18
Poll
How are you feeling in the run-up to Results Day 2018?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.