Pith Number

pith:U2RKIKNN

pith:2017:U2RKIKNNPE7SQ3PPCNU3U5HHV3

not attested not anchored not stored refs pending

Singular limit of the porous medium equation with a drift

Brent Woodhouse, Inwon Kim, Norbert Po\v{z}\'ar

arxiv:1708.05842 v1 · 2017-08-19 · 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{U2RKIKNNPE7SQ3PPCNU3U5HHV3}

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	2026-05-18T00:37:44.047291Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a6a2a429ad793f286def1369ba74e7aef5f9cb39317ba27075b33b45b26a1ce4

Aliases

arxiv: 1708.05842 · arxiv_version: 1708.05842v1 · doi: 10.48550/arxiv.1708.05842 · pith_short_12: U2RKIKNNPE7S · pith_short_16: U2RKIKNNPE7SQ3PP · pith_short_8: U2RKIKNN

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/U2RKIKNNPE7SQ3PPCNU3U5HHV3 \
  | 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: a6a2a429ad793f286def1369ba74e7aef5f9cb39317ba27075b33b45b26a1ce4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6f9c2c556e1632be7223eacd26e041999ed9e4b3ed63b86145c3bfce8f66db43",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2017-08-19T13:23:43Z",
    "title_canon_sha256": "9a993b7969547bb188689d88f350cde8019190bc79a7b2429c3891ca920a3f85"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1708.05842",
    "kind": "arxiv",
    "version": 1
  }
}