The two points a and b form the boundary of the open interval.

He looked up as there was a roar from the open interval beyond the fence.

For the n-sphere, and also when taken together with a product of open intervals, we have the following.

The standard topology on R is generated by the open intervals.

The open interval does not have the fixed-point property.

The shouts followed the truck as it crossed the open interval and disappeared through the gate.

An open interval does not include its endpoints, and is indicated with parentheses.

Here, the basic open sets are the half open intervals a, b).

The open intervals as base define a topology on .

When you try to cover a line by dropping open intervals on it, you always end up covering some points twice.

Assuming that the domains of the functions are open intervals:

Given the same polynomial and the open interval the substitutions and can be made.

Let be an open interval, a real-valued differentiable function.

In this case, is the smallest σ-algebra that contains the open intervals of .

Let be an open interval, and be a parametrisation of a smooth plane curve.

The variable z is restricted to the open interval (0,2), and the following conditions are imposed:

The open intervals coincide with the open sets of the real line in its standard topology.

Sufficient for a base are the finite open intervals and the intervals .

Every nonempty open interval of "K" contains a rational.

The reason is that every open interval can be written as a countably infinite union of half-open intervals.

Therefore, the polynomial has either two or no real roots in the open interval , a case that must be further investigated.

If the datum partially satisfies the argument, then the truth value of the data link is in the open interval (-1, 1).

Also the open interval is evidently isomorphic to a part of the closed interval (just itself, for instance).

The open intervals form a base for a natural topology, the cyclic order topology.

To motivate the name "local" for these rings, we consider real-valued continuous functions defined on some open interval around 0 of the real line.