Pith Number

pith:UBX2ENKW

pith:2009:UBX2ENKW4MOYVAF3YDSA5FXK2X

not attested not anchored not stored refs pending

A Random Matrix Approach to Language Acquisition

A. Nicolaidis, Kosmas Kosmidis, Panos Argyrakis

arxiv:0909.3912 v1 · 2009-09-22 · physics.soc-ph

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UBX2ENKW4MOYVAF3YDSA5FXK2X}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T02:11:45.495116Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a06fa23556e31d8a80bbc0e40e96ead5d6ee18e50da2c7510d9c2e57dd59fe1c

Aliases

arxiv: 0909.3912 · arxiv_version: 0909.3912v1 · doi: 10.48550/arxiv.0909.3912 · pith_short_12: UBX2ENKW4MOY · pith_short_16: UBX2ENKW4MOYVAF3 · pith_short_8: UBX2ENKW

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/UBX2ENKW4MOYVAF3YDSA5FXK2X \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: a06fa23556e31d8a80bbc0e40e96ead5d6ee18e50da2c7510d9c2e57dd59fe1c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9dcbae759b75e8d949364a6895c027a4bcd0ed473b2a9b925f524834c36c215d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.soc-ph",
    "submitted_at": "2009-09-22T05:53:15Z",
    "title_canon_sha256": "58bc725f89a4c9b32b02b98ebc399e96ed7c81c328824d0185e6f8b014c50388"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0909.3912",
    "kind": "arxiv",
    "version": 1
  }
}