Pith Number

pith:R222LSPD

pith:2018:R222LSPDM2QIX6HTXP2K2UE4YV

not attested not anchored not stored refs pending

A singularly perturbed convection-diffusion problem posed on an annulus

Alan F. Hegarty, Eugene O'Riordan

arxiv:1804.07160 v1 · 2018-04-19 · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{R222LSPDM2QIX6HTXP2K2UE4YV}

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	2026-05-18T00:18:01.218646Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8eb5a5c9e366a08bf8f3bbf4ad509cc5528e858e25b9798fbb6e893ddd4e6825

Aliases

arxiv: 1804.07160 · arxiv_version: 1804.07160v1 · doi: 10.48550/arxiv.1804.07160 · pith_short_12: R222LSPDM2QI · pith_short_16: R222LSPDM2QIX6HT · pith_short_8: R222LSPD

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/R222LSPDM2QIX6HTXP2K2UE4YV \
  | 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: 8eb5a5c9e366a08bf8f3bbf4ad509cc5528e858e25b9798fbb6e893ddd4e6825

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e0cd513cd57a5df565f85e0b90f1464c44b194625b44b39644c958fa2e2730bf",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-04-19T13:41:33Z",
    "title_canon_sha256": "599d4e4e22b2eb561ae35edaa27d773e5849143fdcdd7c7593bb4c83591a30c9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.07160",
    "kind": "arxiv",
    "version": 1
  }
}