The words are simply connected with de (of), without any restrictions.

The point of these tax cuts is not simply connected to their merits.

In two dimensions, a circle is not simply connected, but a disk and a line are.

Their fundamental groups are isomorphic because each space is simply connected.

Since S is simply connected for n 2, it also serves as the universal cover in these cases.

There is an almost complete answer to the first problem of which simply connected compact 4-manifolds have smooth structures.

Their results suggest that any classification of simply connected smooth 4-manifolds will be very complicated.

It has a non-algebraic double cover that is simply connected.

For example, a room with a pillar in the middle, connecting floor to ceiling, is not simply connected.

A major open problem in the theory of smooth 4-manifolds is to classify the simply connected compact ones.