Pith Number

pith:DQA3DTTU

pith:2018:DQA3DTTUGQUX6AX67S7KEGRQUX

not attested not anchored not stored refs pending

Bounded birationality and isomorphism problems are computable

Tuyen Trung Truong

arxiv:1801.00901 v4 · 2018-01-03 · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DQA3DTTUGQUX6AX67S7KEGRQUX}

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	2026-05-18T00:10:54.731714Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1c01b1ce7434297f02fefcbea21a30a5d77a4f5bee06329d83dce214215002c3

Aliases

arxiv: 1801.00901 · arxiv_version: 1801.00901v4 · doi: 10.48550/arxiv.1801.00901 · pith_short_12: DQA3DTTUGQUX · pith_short_16: DQA3DTTUGQUX6AX6 · pith_short_8: DQA3DTTU

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/DQA3DTTUGQUX6AX67S7KEGRQUX \
  | 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: 1c01b1ce7434297f02fefcbea21a30a5d77a4f5bee06329d83dce214215002c3

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8363d68d5d606e19bda45eb1f12e25d6e0e2b42e5decbde3b7813b3ad24c15fc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2018-01-03T05:39:16Z",
    "title_canon_sha256": "68de9a9a8f3b07dec2fb77dec190555bbdab7d9e856534335e6b9a4bbb9ad69a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.00901",
    "kind": "arxiv",
    "version": 4
  }
}