Pith Number

pith:XMDB2HJE

pith:1998:XMDB2HJEOAITKKNQR7KBOLTDLO

not attested not anchored not stored refs pending

An Algorithm to Simplify Tensor Expressions

Renato Portugal

arxiv:gr-qc/9803023 v2 · 1998-03-05 · gr-qc

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XMDB2HJEOAITKKNQR7KBOLTDLO}

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.

Cited by

1 paper in Pith

FeynGrav 4.0

Receipt and verification

First computed	2026-07-04T16:08:46.914059Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bb061d1d2470113529b08fd4172e635b947701f79317fe197e30ae391d5702d7

Aliases

arxiv: gr-qc/9803023 · arxiv_version: gr-qc/9803023v2 · doi: 10.48550/arxiv.gr-qc/9803023 · pith_short_12: XMDB2HJEOAIT · pith_short_16: XMDB2HJEOAITKKNQ · pith_short_8: XMDB2HJE

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/XMDB2HJEOAITKKNQR7KBOLTDLO \
  | 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: bb061d1d2470113529b08fd4172e635b947701f79317fe197e30ae391d5702d7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "364f11069ff23c059aa225e612df5011dae0056962aa7ba6db272d007a1821cf",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "1998-03-05T16:05:17Z",
    "title_canon_sha256": "fa2bbcef978675a73670ea44a5502ba477d1c7a90bd921ece293ab741d8ee5fa"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/9803023",
    "kind": "arxiv",
    "version": 2
  }
}