Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cerebral cortical communication overshadows computational energy-use,
  but these combine to predict synapse number   Darwinian evolution tends to produce energy-efficient outcomes. On the other
hand, energy limits computation, be it neural and probabilistic or digital and
logical. Taking a particular energy-efficient viewpoint, we define neural
computation and make use of an energy-constrained, computational function. This
function can be optimized over a variable that is proportional to the number of
synapses per neuron. This function also implies a specific distinction between
ATP-consuming processes, especially computation \textit{per se} vs the
communication processes including action potentials and transmitter release.
Thus to apply this mathematical function requires an energy audit with a
partitioning of energy consumption that differs from earlier work. The audit
points out that, rather than the oft-quoted 20 watts of glucose available to
the brain \cite{sokoloff1960metabolism,sawada2013synapse}, the fraction
partitioned to cortical computation is only 0.1 watts of ATP. On the other hand
at 3.5 watts, long-distance communication costs are 35-fold greater. Other
novel quantifications include (i) a finding that the biological vs ideal values
of neural computational efficiency differ by a factor of $10^8$ and (ii) two
predictions of $N$, the number of synaptic transmissions needed to fire a
neuron (2500 vs 2000).

36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con