Pith Number

pith:MVQFL7AS

pith:2011:MVQFL7ASWFFSEH4QFCQC44IJTO

not attested not anchored not stored refs pending

Computability, Noncomputability, and Hyperbolic Systems

Daniel S. Graca, Jorge Buescu, Ning Zhong

arxiv:1201.0164 v1 · 2011-12-30 · math.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{MVQFL7ASWFFSEH4QFCQC44IJTO}

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	2026-05-18T00:56:53.021740Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

656055fc12b14b221f9028a02e71099ba4640c6c04805ed3a1ff1ce943e3f5a8

Aliases

arxiv: 1201.0164 · arxiv_version: 1201.0164v1 · doi: 10.48550/arxiv.1201.0164 · pith_short_12: MVQFL7ASWFFS · pith_short_16: MVQFL7ASWFFSEH4Q · pith_short_8: MVQFL7AS

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/MVQFL7ASWFFSEH4QFCQC44IJTO \
  | 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: 656055fc12b14b221f9028a02e71099ba4640c6c04805ed3a1ff1ce943e3f5a8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4f48e5b5a68c3bc8a92866206d51eebca2df08e8629480082c8b78bb15b2adf0",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2011-12-30T18:41:45Z",
    "title_canon_sha256": "82849f5604b2a0157358901fb6c219a1a75bc9fc1090dda9ee8cea99573404db"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.0164",
    "kind": "arxiv",
    "version": 1
  }
}