Pith Number

pith:Q57E2Y4V

pith:2015:Q57E2Y4VK3WWPU6TXPYIDJLCGZ

not attested not anchored not stored refs pending

On the Well-Posedness of Global Fully Nonlinear First Order Elliptic Systems

Hussien Abugirda, Nikos Katzourakis (Reading, UK)

arxiv:1511.02809 v2 · 2015-11-09 · math.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Q57E2Y4VK3WWPU6TXPYIDJLCGZ}

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	2026-05-18T01:17:32.735357Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

877e4d639556ed67d3d3bbf081a562365144e61b8d82de3c059ce1b305410c93

Aliases

arxiv: 1511.02809 · arxiv_version: 1511.02809v2 · doi: 10.48550/arxiv.1511.02809 · pith_short_12: Q57E2Y4VK3WW · pith_short_16: Q57E2Y4VK3WWPU6T · pith_short_8: Q57E2Y4V

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/Q57E2Y4VK3WWPU6TXPYIDJLCGZ \
  | 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: 877e4d639556ed67d3d3bbf081a562365144e61b8d82de3c059ce1b305410c93

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "574cb7b671af1424b6f7f90ab5bf0b2fb12882518ab67e2747ac9c2af886a531",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2015-11-09T19:16:59Z",
    "title_canon_sha256": "2aec5eb61e5e7adcc4538ac5d455e2c87729b57383389aeb763fd184a6558bc0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.02809",
    "kind": "arxiv",
    "version": 2
  }
}