# What is weak star topology?

## What is weak star topology?

The weak-* (pronounced “weak star”) topology on is defined to be the -topology on , i.e., the coarsest topology (the topology with the fewest open sets) under which every element corresponds to a continuous map on . The weak-* topology is sometimes called the ultraweak topology or the. -weak topology.

Which is weakest topology?

Weak topology induced by the continuous dual space remains a continuous function. From this point of view, the weak topology is the coarsest polar topology; see weak topology (polar topology) for details.

What is star topology explain with diagram?

A star topology is a topology for a Local Area Network (LAN) in which all nodes are individually connected to a central connection point, like a hub or a switch. A star takes more cable than e.g. a bus, but the benefit is that if a cable fails, only one node will be brought down.

### Is the weak topology hausdorff?

1 The weak topology is Hausdorff. sequence converges to x E V in the norm topology, i.e. if Ilxn – xii –> 0 as n –> 00. If the sequence converges to x in the weak topology, we write Xn —-‘- X. Proposition 5.1.

What is strong convergence?

In mathematics, strong convergence may refer to: The strong convergence of random variables of a probability distribution. The norm-convergence of a sequence in a Hilbert space (as opposed to weak convergence). The convergence of operators in the strong operator topology.

What is the coarsest topology?

The coarsest topology on X is the trivial topology; this topology only admits the empty set and the whole space as open sets. In function spaces and spaces of measures there are often a number of possible topologies. See topologies on the set of operators on a Hilbert space for some intricate relationships.

High speed High maintenance
Highly scalable network High dependency on the central device
Highly efficient Expensive
Centralized network management Requires additional equipment

What is a star topology discuss its various advantages and disadvantages as well?

Highly efficient Expensive
Centralized network management Requires additional equipment
Safe to use Immobile systems
No point-to-point connections Wires or cables used in the network get damaged easily

Why are weak topology weaker than the norm topology?

The weak topology is weaker than the norm topology: every weakly open (resp. closed) set is strongly open (resp. closed). Proof: The first point is clear: the norm topology already makes all linear functionals continuous.

### What is norm topology?

The norm topology on a normed space is the topology consisting of all sets which can be written as a (possibly empty) union of sets of the form. for some and for some number . Sets of the form are called the open balls in .

Why star topology is the best topology for school?

What Is Network Topology And What Are Its Different Types?

• What Is Bus Topology And What Are Its Types?
• What is one advantage to using a star topology?

– Easy to install and wire. – No disruptions to the network when connecting or removing devices. – Easy to detect faults and to remove parts. – Requires more cable length than a linear bus topology. – If the connecting network device ( network switch) fails, nodes attached are disabled and cannot participate in computer network communication.

## Is star topology faster then mesh topology?

In star topology devices are connected to the center switch or hub and all interconnection between them are done through that center hub. But in mesh topology each devices are connected to other devices directly by individual cables without using center hub. Theoretically the fastest topology should be mesh topology.

What are advantages of star topology over ring topology?

Requires more cable than a linear bus .

• If the connecting network device (network switch) fails,nodes attached are disabled and canâ€™t participate in network communication.
• More expensive than linear bus topology due to the value of the connecting devices (network switches)