Pith Number

pith:JIC5KG5K

pith:2019:JIC5KG5KBGREM5CXNJ7D2PTJGT

not attested not anchored not stored refs pending

Descriptive Complexity of Computable Sequences Revisited

Nikolay Vereshchagin

arxiv:1902.01279 v1 · 2019-02-04 · 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{JIC5KG5KBGREM5CXNJ7D2PTJGT}

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	2026-05-17T23:54:49.275080Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4a05d51baa09a24674576a7e3d3e6934e618828eb1f96dd7e173a5a99ba6096f

Aliases

arxiv: 1902.01279 · arxiv_version: 1902.01279v1 · doi: 10.48550/arxiv.1902.01279 · pith_short_12: JIC5KG5KBGRE · pith_short_16: JIC5KG5KBGREM5CX · pith_short_8: JIC5KG5K

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/JIC5KG5KBGREM5CXNJ7D2PTJGT \
  | 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: 4a05d51baa09a24674576a7e3d3e6934e618828eb1f96dd7e173a5a99ba6096f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "1826d56b7d2d1badfc185b82c2f5ca2db88f708dab1078e905b050b12bd9423a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2019-02-04T16:13:01Z",
    "title_canon_sha256": "e0c3b05dc07a226e058aeb6ad708f1d1aedc332c7e05e6558b4ffebd564a0290"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.01279",
    "kind": "arxiv",
    "version": 1
  }
}