Pith Number

pith:XRS7C3G2

pith:2017:XRS7C3G2JDEZJVYSQ5HAS5VY2P

not attested not anchored not stored refs pending

The Variational Bi-Complex for Systems of Semi-Linear Hyperbolic PDEs in Three Variables

Sara Froehlich

arxiv:1712.03068 v2 · 2017-12-08 · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XRS7C3G2JDEZJVYSQ5HAS5VY2P}

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	2026-05-18T00:06:12.039341Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bc65f16cda48c994d712874e0976b8d3e882be4fac7bb58e3888bb17afb30c68

Aliases

arxiv: 1712.03068 · arxiv_version: 1712.03068v2 · doi: 10.48550/arxiv.1712.03068 · pith_short_12: XRS7C3G2JDEZ · pith_short_16: XRS7C3G2JDEZJVYS · pith_short_8: XRS7C3G2

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/XRS7C3G2JDEZJVYSQ5HAS5VY2P \
  | 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: bc65f16cda48c994d712874e0976b8d3e882be4fac7bb58e3888bb17afb30c68

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "44884679af326c0f739edc2d76f96f42e614b80868d9c5a8868c414e8a25a734",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2017-12-08T14:08:18Z",
    "title_canon_sha256": "16d6520bfe42c9bffd93a153ae18cb91ccf1fec03dcad5a0608b6c9a1d0ed50f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1712.03068",
    "kind": "arxiv",
    "version": 2
  }
}