Pith Number

pith:FY5LFLNH

pith:2014:FY5LFLNHZ3CZN2WGKB5TO4FDUX

not attested not anchored not stored refs pending

Local estimates for positive solutions of porous medium equations

Zhongmin Qian, Zichen Zhang

arxiv:1403.1821 v1 · 2014-03-07 · 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{FY5LFLNHZ3CZN2WGKB5TO4FDUX}

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	2026-05-18T02:56:52.489931Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2e3ab2ada7cec596eac6507b3770a3a5d00a1ee5b3068e366fc42d1fa10a1fab

Aliases

arxiv: 1403.1821 · arxiv_version: 1403.1821v1 · doi: 10.48550/arxiv.1403.1821 · pith_short_12: FY5LFLNHZ3CZ · pith_short_16: FY5LFLNHZ3CZN2WG · pith_short_8: FY5LFLNH

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/FY5LFLNHZ3CZN2WGKB5TO4FDUX \
  | 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: 2e3ab2ada7cec596eac6507b3770a3a5d00a1ee5b3068e366fc42d1fa10a1fab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bff5377050720177f178995b9c79826a497871deb860702c59ddf3790567fc1a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2014-03-07T17:35:35Z",
    "title_canon_sha256": "1e95b27e89a0d89dcfded59b8f890d97f03b817adb66c4f205457df916f4a39b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1403.1821",
    "kind": "arxiv",
    "version": 1
  }
}