Glossary

Glossary

Codebase-specific terms for LiquidCortex.jl onboarding. Pointers refer to main layout.

Term	Definition	Code pointer
LSM	Liquid State Machine — recurrent reservoir + readout	package overview
SparseBrain	65,536-neuron sparse CUDA lobe with OU-SDE LIF dynamics	src/sparse_brain.jl
EnsembleBrain	Four SparseBrain lobes with fixed aggregation weights	src/sparse_brain.jl
Reference LSM	2,048 dense tanh reservoir for prototyping	src/reference_lsm.jl
OU-SDE	Ornstein–Uhlenbeck stochastic differential equation for membrane noise	SIGMA, noise term in _step_impl!
LIF	Leaky integrate-and-fire style spike / reset / refrac	V, S, refrac
τ_m / tau_m	Membrane time constant (ms); per-lobe in ensemble	LOBE_TAUS, constructor arg
cuSPARSE	CUDA sparse mat-vec for W * S in Float16	CuSparseMatrixCSC
Float16 weights	Recurrent sparse values stored as F16 to fit VRAM	W field
Echo-state scaling	Init scales sparse W toward spectral radius ≈ 0.9	constructor scale_factor
Xavier / Glorot	Variance scaling for W_in / W_out init	constructor
Global inhibition	Caller scalar raises v_thresh_dynamic	INHIBITION_GAIN, MAX_INHIBITION
Reflex gating	`	reflex_signal
Flash-learning	Informal name for the 5× Fast-lobe rate boost	ensemble path
STDP / covariance learning	Trace-based plasticity framing; implemented Hebb on W_out	traces + 10-tick update
Eligibility trace	Decaying pre/post spike memory	trace_pre, trace_post
History buffer	Circular HIST_DEPTH × N spike log	history, hist_idx, hist_full
COV_SUBSAMPLE	8192 neurons for tractable covariance	compute_reservoir_covariance!
_cuda_available	Ref{Bool} set in __init__ from CUDA.functional()	src/LiquidCortex.jl
cpu_randn_cu	Host Gaussian sample + upload (CUDA RNG workaround)	sparse_brain.jl
n_in / n_out	Configurable input/output dimensions	constructors
MarketPulse (removed)	Former domain pulse type; not exported after PR #12	tests assert absence
Sentry capture	Non-blocking exception report when DSN set	_capture_runtime_exception
Lobe weights	0.4 / 0.3 / 0.2 / 0.1 Fast→Integrator	LOBE_WEIGHTS

Key Numeric Defaults

Name	Value
N	65_536
CONN_PROB	0.01
HIST_DEPTH	1000
ETA	0.001
Default SparseBrain n_in / n_out	14 / 16
Reference REF_N	2048

See Also

• Home
• Core Architecture
• Public API

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Last updated: July 28, 2026 Updated by: Grok Build: Grok 4.5 Package tip reference: 4e2698c (main)