Pith Number

pith:Q2J6PU3O

pith:2016:Q2J6PU3OR7JWJ4M3UGWFSIVSH2

not attested not anchored not stored refs pending

A gradient flow approach to the porous medium equation with fractional pressure

Antonio Segatti, Edoardo Mainini, Stefano Lisini

arxiv:1606.06787 v2 · 2016-06-21 · 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{Q2J6PU3OR7JWJ4M3UGWFSIVSH2}

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	2026-05-18T00:33:23.546358Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8693e7d36e8fd364f19ba1ac5922b23ea0ac9f4bdbc5433b19ce902a051c1e33

Aliases

arxiv: 1606.06787 · arxiv_version: 1606.06787v2 · doi: 10.48550/arxiv.1606.06787 · pith_short_12: Q2J6PU3OR7JW · pith_short_16: Q2J6PU3OR7JWJ4M3 · pith_short_8: Q2J6PU3O

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/Q2J6PU3OR7JWJ4M3UGWFSIVSH2 \
  | 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: 8693e7d36e8fd364f19ba1ac5922b23ea0ac9f4bdbc5433b19ce902a051c1e33

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "78dd1175f6710693b462fe9a50772ae8545d71a402211a6920b9e925dc62c56f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2016-06-21T22:35:03Z",
    "title_canon_sha256": "35fca83bece25d55337d76f6b5ae3ae6ba79c7abf062c8773edec68b30e1e1b7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1606.06787",
    "kind": "arxiv",
    "version": 2
  }
}