Pith Number

pith:PWCPB4NX

pith:2014:PWCPB4NX2MHT25CTKJRJAS6BFW

not attested not anchored not stored refs pending

Perron's method for the porous medium equation

Juha Kinnunen, Peter Lindqvist, Teemu Lukkari

arxiv:1401.4277 v2 · 2014-01-17 · 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{PWCPB4NX2MHT25CTKJRJAS6BFW}

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	2026-05-18T02:32:22.432279Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7d84f0f1b7d30f3d74535262904bc12da1ad075734ef6d207582cd4c385158c6

Aliases

arxiv: 1401.4277 · arxiv_version: 1401.4277v2 · doi: 10.48550/arxiv.1401.4277 · pith_short_12: PWCPB4NX2MHT · pith_short_16: PWCPB4NX2MHT25CT · pith_short_8: PWCPB4NX

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/PWCPB4NX2MHT25CTKJRJAS6BFW \
  | 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: 7d84f0f1b7d30f3d74535262904bc12da1ad075734ef6d207582cd4c385158c6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "34b01a723d2cfbeaa50e8a71f4134951270ab25acfb72363e05bb0ee6ac9bbca",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2014-01-17T09:16:28Z",
    "title_canon_sha256": "ab217a57131db26ff740126444fb690b7a5d96536ac55b596d4b89e3e765cee5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.4277",
    "kind": "arxiv",
    "version": 2
  }
}