## What is the meaning of queue number?

In mathematics, the queue number of a graph is a graph invariant defined analogously to stack number (book thickness) using first-in first-out (queue) orderings in place of last-in first-out (stack) orderings.

## Where do we see queues?

Queues can be found in railway stations to book tickets, at bus stops for boarding and at temples as well. Queues are generally found at transportation terminals where security screenings are conducted.

Why should we stand in a queue?

Groups of people will often self-organise while waiting. “People usually choose to queue because it is fair,” Professor Haslam says. “In fact, queues are places where people are obsessed with fairness, and where cutting in line is seen as a terrible crime that can lead to all sorts of scuffles, fights and frictions.

What means send queue?

If an email is queued, that means that the email you’re trying to send is stuck in your outbox. However, know that queued emails typically get delivered later without any issues.

### How do you describe a queue?

Full Definition of queue (Entry 1 of 2) 1 : a braid of hair usually worn hanging at the back of the head. 2 : a waiting line especially of persons or vehicles. 3a : a sequence of messages or jobs held in temporary storage awaiting transmission or processing.

### Can a queue be one person?

1) A queue is formed when the first person positions themselves at ‘The Start of the Queue’: yes, one person can be a queue – if they are standing at the Start of the Queue.

What is a queuing problem?

What is a queuing problem? A queue occurs when there are more customers than employees to serve them. This means that customers have to wait for their turn. Whether the waiting itself is an issue or not can only be determined by the customers.

What happens when an email is queued?

If an email is queued, that means that the email you’re trying to send is stuck in your outbox. There could be many reasons why that might happen. However, know that queued emails typically get delivered later without any issues.