[...] the possibility must be forseen that the registration of certain functions may, by virtue of the solidarity between function and functive, oblige us to interpolate certain functives which would in no other way be accessible to knowledge. This interpolation we call ‘catalysis’.
- Hjelmslev (1961), a pag.93-94

‘Catalysis’ we define as a registration of cohesions through the replacement of one entity by another to which it has substitution.
- Hjelmslev (1961), a pag.95

What is introduced by catalysis is [...] in most instances not some particular entity but an irresoluble syncretism between all the entities that might be considered possible in the given “place” in the chain.
- Hjelmslev (1961), a pag.95