Discussion
Ask a question about 'Nogo theorem'
Start a new discussion about 'Nogo theorem'
Answer questions from other users

In
theoretical physicsTheoretical physics is a branch of physics which employs mathematical models and abstractions of physics to rationalize, explain and predict natural phenomena...
, a
nogo theorem is a
theoremIn mathematics, a theorem is a statement that has been proven on the basis of previously established statements, such as other theorems, and previously accepted statements, such as axioms...
that states that a particular situation is not physically possible.
Examples of nogo theorems
 Bell's theorem
In theoretical physics, Bell's theorem is a nogo theorem, loosely stating that:The theorem has great importance for physics and the philosophy of science, as it implies that quantum physics must necessarily violate either the principle of locality or counterfactual definiteness...
 Coleman–Mandula theorem
 HaagLopuszanskiSohnius theorem
In theoretical physics, the Haag–Lopuszanski–Sohnius theorem shows that the possible symmetries of a consistent 4dimensional quantum field theory do not only consist of internal symmetries and Poincaré symmetry, but can also include supersymmetry as a nontrivial extension of the Poincaré algebra...
 Earnshaw's theorem
Earnshaw's theorem states that a collection of point charges cannot be maintained in a stable stationary equilibrium configuration solely by the electrostatic interaction of the charges. This was first proven by British mathematician Samuel Earnshaw in 1842. It is usually referenced to magnetic...
 Heisenberg uncertainty principle
In quantum mechanics, the Heisenberg uncertainty principle states a fundamental limit on the accuracy with which certain pairs of physical properties of a particle, such as position and momentum, can be simultaneously known...
 WeinbergWitten theorem
 Antidynamo theorem
In physics and in particular in the theory of magnetism, an antidynamo theorem is one of several results that restrict the type of magnetic fields that may be produced by dynamo action....
s (e.g. Cowling's Theorem)
 Nocommunication theorem
In quantum information theory, a nocommunication theorem is a result which gives conditions under which instantaneous transfer of information between two observers is impossible. These results can be applied to understand the socalled paradoxes in quantum mechanics such as the EPR paradox or...
 Noteleportation theorem
 Nocloning theorem
 Nobroadcast theorem
The nobroadcast theorem is a result in quantum information theory. In the case of pure quantum states, it is a corollary of the nocloning theorem: since quantum states cannot be copied in general, they cannot be broadcast...