Pith Number

pith:2VCDJSQC

pith:2016:2VCDJSQCF4XHUJ2K5SQ3CUQVKW

not attested not anchored not stored refs pending

A Note on the Quartic Diophantine Equation $A^4+hB^4=C^4+hD^4$

Ajai Choudhry

arxiv:1608.06220 v1 · 2016-08-19 · 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{2VCDJSQCF4XHUJ2K5SQ3CUQVKW}

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	2026-05-18T01:08:21.963546Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d54434ca022f2e7a274aeca1b152155596e998fe4a56144e407248e8c4988ee5

Aliases

arxiv: 1608.06220 · arxiv_version: 1608.06220v1 · doi: 10.48550/arxiv.1608.06220 · pith_short_12: 2VCDJSQCF4XH · pith_short_16: 2VCDJSQCF4XHUJ2K · pith_short_8: 2VCDJSQC

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/2VCDJSQCF4XHUJ2K5SQ3CUQVKW \
  | 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: d54434ca022f2e7a274aeca1b152155596e998fe4a56144e407248e8c4988ee5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "98b44942ac98f30625fe54461b10445291ad6df48b9963eff83302b2a3f6f3c6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NT",
    "submitted_at": "2016-08-19T04:13:37Z",
    "title_canon_sha256": "9b8fe6efdd54a82e6db02d58d8a06820ea3a67960b7592378b9b4317afaefd3c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1608.06220",
    "kind": "arxiv",
    "version": 1
  }
}