No, a mathematical model of consciousness is not possible. First we must distinguish between the natural consciousness of Dasein studied according to Heidegger's analytic (in which there are indeed certain proto-topological notions present) and the awakened insight-imbued ego-absolving consciousness. In both cases the idea of a mathematical model of consciousness is a serious mistake because all mathematics assumes that the fundamental problems regarding circularity in the a priori and analytic we discussed have been solved (i.e. by modelling consciousness via mathematics we are already making assumptions about consciousness necessary to justify the use of mathematics). This is analogous to the error of trying to give a philosophical account of language via meaning-as-use theories. As we wrote in the conclusion of our paper on Analyticity, Computability and the A Priori:
How can we shed greater light on the questions and problems discussed in this note? What methods should be employed to go beyond the seemingly unbreakable circularity between logic, computation, arithmetic and combinatorial intuition? A possible answer lies in adopting a rigorous phenomenological approach or the combination of such an approach with something along the lines of Piaget's genetic epistemology. We need to investigate thoroughly what it means for us to learn something (like counting, calculating), to know how to do something, to understand rules, to know how to play a game and to understand a game. All of this is at present unclear and difficult. It is naive and dogmatic to take these topics that demand extensive investigation and elucidation as some kind of philosophical explanation as done for instance in meaning-as-use theories. The elucidation in question needs to proceed not by formal abstract reification (which leads to the same circularity) but by investigation of the matter itself in its concrete lived experience, both personal and interpersonal.
We of course must be careful about what we mean by 'model' or in what sense we are discussing the 'modelling' of something. The specific sense we had in mind here is that of theoretical physics: the model, a theoretical system consisting predominantly of mathematical structures, is posited as representing or reflecting the actual fundamental structure and process of the physical world, so much so that physicists in possession of complex mathematical theories (which do not involve any trace of ordinary physical intuition) usually speak of attaining a deeper 'understanding of nature' . This is, of course, very different from the 'models' used in engineering simulations or in applied mathematics. All talk about consciousness, from the theories used in behaviorist or Gestalt psychology, theories of personality, Heidegger's analytic of Dasein, Piaget's genetic epistemology, the Buddhist abhidhamma - are in a sense 'models' of consciousness and as such perfectly legitimate expressions of the human desire to understand. There is nothing wrong with some of the most technical or sophisticated of these models employing mathematics as an extension of their language, mode of description and theoretical articulation (*). However this all very different from the idea of a mathematical model of consciousness conceived in a fundamental, philosophical, all-embracing sense analogous to the way mathematical models of theoretical physics are posited as models of nature. This is, as we saw above, a fundamental error and category mistake (we cannot relegate consciousness to a self-contained isolated regional ontology as done in the domains of the sciences) which ignores the fundamental question of the foundations of mathematics itself (in the circle of the analytic a priori). Mathematics is a fundamental problem of consciousness, not itself a key to solving the philosophical problems of consciousness (in Kantian language: the question of how a priori synthetic judgments are possible is essentially a problem of consciousness). There can be consciousness, conscious experience, without mathematics or mathematical activity, but there can be no mathematics or mathematical activity without consciousness. Thus consciousness, not mathematics, is the ontological primitive. Again, consciousness is Turing complete and has inherent meta-postulates regarding meta-interpretation, reflection and hypercomputation: in particular it represents a term-rewriting system which can produce a $n$-length derivation of any term-rewriting system for a given initial word. But any mathematical model represents only a particular term-rewriting system (recursive axiomatic-deductive system) which cannot express the universal computational capacity of consciousness or the general inherent meta-postulates of consciousness. Thus no mathematical model can be an adequate model of consciousness. Or, in more concrete terms, consciousness is the power of playing all games, while a mathematical model can represent only a particular game. Thus a mathematical model cannot adequately capture consciousness.
Positions which would deny that mathematics is a fundamental problem of consciousness are among the following. Positions like those of Carnap, Quine and meaning-as-use we have critiqued in our Analyticity, Computability and the A Priori. Our critique also applies to versions of Fregean logicism. But the most obvious examples are forms of physicalism: eliminationism, theories of emergence, functionalism and its (computationalist) neuro-reductionist variants. In this context one needs but to be in possession of a sophisticated enough physical-mathematical-computational model (which may be stochastic or quantum) of the brain in order to have an adequate mathematical model of consciousness, for consciousness is considered to be an emergent phenomenon and its fundamental structures and processes are considered to be theoretically deducible from such a model. Some theories introduce a twist in which the ontological primitives are considered to be 'mind-like' (for instance so-called panpsychism) but which in their articulation and theories of actual consciousness are indistinguishable from physicalism.
(*) In the domains of consciousness involved in psycho-somatic feedback the theory of partial differential equations (the study of oscillatory, radiative, diffusive, equilibrium, deformation and transport phenomena) may play an important role in the study of certain aspects of consciousness - thus lending a scientific basis to many of the linguistic metaphors employed for describing the mind (and the process of meditation). The design of certain complex software such as the Linux Kernel or a RPG game may reflect the structure of consciousness once we abstract away the underlying architecture of the hardware and consider other forms of hardware (truly concurrent hardware, neural nets or celullar automata - something like contemporary GPUs). This being the case, it is very plausible that formal systems accounting for dynamic concurrent interacting processes are important for studying consciousness. While some aspects of LLMs may be interesting for the study of cognitive-semantic architecture (and these aspects very likely could be much improved) there is also much which clearly is meant to have only a practical design and significance.
