Pith Number

pith:RYVT4NWV

pith:2019:RYVT4NWVP2JC4GK54RVXSL6AIU

not attested not anchored not stored refs pending

Boundary layer expansions for initial value problems with two complex time variables

Alberto Lastra, St\'ephane Malek

arxiv:1904.04886 v1 · 2019-04-09 · math.CV · 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{RYVT4NWVP2JC4GK54RVXSL6AIU}

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	2026-05-17T23:48:57.739010Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8e2b3e36d57e922e195de46b792fc0451fe39c69cfcf06155bfa2fca188fc346

Aliases

arxiv: 1904.04886 · arxiv_version: 1904.04886v1 · doi: 10.48550/arxiv.1904.04886 · pith_short_12: RYVT4NWVP2JC · pith_short_16: RYVT4NWVP2JC4GK5 · pith_short_8: RYVT4NWV

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/RYVT4NWVP2JC4GK54RVXSL6AIU \
  | 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: 8e2b3e36d57e922e195de46b792fc0451fe39c69cfcf06155bfa2fca188fc346

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ab82326886b0eb3dfe0fcf16f3d72d0fc7a5d428af5382f5331e3a8cca27e760",
    "cross_cats_sorted": [
      "math.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.CV",
    "submitted_at": "2019-04-09T19:55:49Z",
    "title_canon_sha256": "c3356afd2a4d8b7d2e79483729d1eaa562824022c7ff0ade16081b5b69d1fb12"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.04886",
    "kind": "arxiv",
    "version": 1
  }
}