Pith Number

pith:5J2677PW

pith:2014:5J2677PW3RIK4OBWSSS27UGPGE

not attested not anchored not stored refs pending

An Elementary Proof That Rationally Isometric Quadratic Forms Are Isometric

Uriya A. First

arxiv:1404.5022 v2 · 2014-04-20 · math.RA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5J2677PW3RIK4OBWSSS27UGPGE}

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	2026-05-18T02:19:36.207036Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ea75effdf6dc50ae383694a5afd0cf313d016c6fec13a23a5e1d20d26b651929

Aliases

arxiv: 1404.5022 · arxiv_version: 1404.5022v2 · doi: 10.48550/arxiv.1404.5022 · pith_short_12: 5J2677PW3RIK · pith_short_16: 5J2677PW3RIK4OBW · pith_short_8: 5J2677PW

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/5J2677PW3RIK4OBWSSS27UGPGE \
  | 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: ea75effdf6dc50ae383694a5afd0cf313d016c6fec13a23a5e1d20d26b651929

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c1874491911e2770f564cf54b819e3cc646c88cac9953ffedb633317ae10cd23",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.RA",
    "submitted_at": "2014-04-20T06:39:15Z",
    "title_canon_sha256": "544772576c5c2e3bc4caf025ed5adb3ce1f82577ab4d49717e32463a5d8438d0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.5022",
    "kind": "arxiv",
    "version": 2
  }
}