Pith Number

pith:3F5UMEJU

pith:2015:3F5UMEJULNX3MSRE6TSREINPZF

not attested not anchored not stored refs pending

Diophantine Equation $X^4+Y^4=2(U^4+V^4)$

Farzali Izadi, Kamran Nabardi

arxiv:1501.05803 v1 · 2015-01-23 · math.NT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3F5UMEJULNX3MSRE6TSREINPZF}

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	2026-05-18T02:28:48.936782Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d97b4611345b6fb64a24f4e51221afc950f737ea4de71c7fe2bdad780b63c760

Aliases

arxiv: 1501.05803 · arxiv_version: 1501.05803v1 · doi: 10.48550/arxiv.1501.05803 · pith_short_12: 3F5UMEJULNX3 · pith_short_16: 3F5UMEJULNX3MSRE · pith_short_8: 3F5UMEJU

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/3F5UMEJULNX3MSRE6TSREINPZF \
  | 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: d97b4611345b6fb64a24f4e51221afc950f737ea4de71c7fe2bdad780b63c760

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9907e31c2408d4521d7e6fd43c36f8dac115c076666f5e4ed76648b0b010e9de",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "math.NT",
    "submitted_at": "2015-01-23T14:01:08Z",
    "title_canon_sha256": "ee83a88797b8795dee3ce9c5cc70850658f6346263e28f7804da06601189fa1f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.05803",
    "kind": "arxiv",
    "version": 1
  }
}