Summary: Only variation can force variation down - exact conditions necessary. 4662, 4674, 4750 Entropy necessary for regulation Output variety in Variety necessary for regulation
Summary: Error-controlled regulation is possible only by blocking conduction.
Information and observer Epistemology [34]: When variety arrives, the observer who sees all sees unity changing to diversity;
the element in the set sees diversity change to unity. 4691.
Summary: In information, the point of view of the element is very different from that of the
set. Searching variety in
Homeostat its discontinuous 2nd order process can be changed through intermediates to that of
thermostat Markov process / chain can be modified to give a field Regulation discontinuous and continuous are related Trial and error relation to continuous stability
4694
4695
4696
4697
Summary: Progression to an absorbing state in a Markov chain and progression along a line of
behaviour in a stable, continuous system are two extremes of a continuous scale. 4842
Summary: If a designer is only partly responsible for the determination of a machine, the fraction
(implied by "partly") can be given meaning only if there is no loss of variety in
the transduction.
4702
4703
Summary: A determinate machine, with single-valued field, can be formed only by supplying variety
of n log n bits. 4722 Homeostat quantity of design in
Summary: "Survival in spite of disturbance" in the terms of set theory. 4790, 4795
4786
4787
Summary: "Output to an input" is a relation of order, and may give a lattice. Arc as partly ordered set Cortex partly ordered arcs in Input input to output as order Lattice input to output lattice Order among arcs Output output to input, as order Partly ordered set arcs as partly ordered set
Summary: Complex taps can be easily built by mere conjunction of many simple. 4792 Design of complex tap Dynamic system for repetitive work Machine for repetitive regulation Relay design of
4788
4789
Summary: I am able to approach the subject of the origin of intelligence, i.e. regulation,
from two points of view, but do not seem to be able to relate them.
Summary: Every machine on states M defies "machines" on states in M^{n} (n=1,2,...). Only in the latter is variety bound to fall. (Its "tensor powers") 4869 Summary: "Transformation". Disturbance repetitive disturbance Mapping and transformation Transformation definition of
Arc active and inactive Memory in discriminative feedback The Multistable System [89]: In the multistable system there must be parts not activated in each reaction. 4831.
Summary: Machines, with inputs and outputs, treated wholly by mappings. All this is, in substance, identical with Riguet's form. 4867. Simpler 4876, 4991
Summary: A "machine" implies two sets and a mapping; coupling requires an extra mapping. 4932, 4952, Formal statement 5097 Machine defined finally Mapping machine as
Summary: "Independence" is a special case of "incomplete transmission of variety". Independence as non-transmission of variety Variety and independence
Summary: Speed is merely one of many demands that can made to qualify simple adaptation. 4964 Optimum selecting efficiently Selection definition of object by reference to others
Summary: The "partly observable machine with input." 4956 Epistemology [45]: "Observing" or "studying" a machine means getting sequence of inputs and outputs alternately,
4953.
Epistemology [46]: The method of getting absoluteness by using past values is essentially second-rate
4960.
Summary: When a system is partly unobservable, the method of trying to restore absoluteness
by taking earlier values into account is fundamentally second-rate; it will succeed
only when the case is peculiarly favourable. 4979
Summary: Science is interested chiefly in the case where the parameters and states are so related
that every state is accessible at will. 4989 Equilibrium in the hierarchy Hierarchy (of Bourbaki) equilibrium
Summary: Whether properties "emerge" or not depends on our knowledge of the parts. Summary: Why information? Energy an old question Information and energy
4986
4987
Summary: "How to dichotomise" takes time to be learned. Dichotomy achieving