Pith Number

pith:IHD6YZJL

pith:2026:IHD6YZJLKPR5DPK3R5ODWV3BSF

not attested not anchored not stored refs pending

On the well-posedness of porous medium equations on general metric measure spaces

Diwen Chang

arxiv:2607.20894 v1 · 2026-07-23 · 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{IHD6YZJLKPR5DPK3R5ODWV3BSF}

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	2026-07-24T00:23:40.366569Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

41c7ec652b53e3d1bd5b8f5c3b576191528cf6fd82da7893ad759aa69e7cb515

Aliases

arxiv: 2607.20894 · arxiv_version: 2607.20894v1 · doi: 10.48550/arxiv.2607.20894 · pith_short_12: IHD6YZJLKPR5 · pith_short_16: IHD6YZJLKPR5DPK3 · pith_short_8: IHD6YZJL

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/IHD6YZJLKPR5DPK3R5ODWV3BSF \
  | 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: 41c7ec652b53e3d1bd5b8f5c3b576191528cf6fd82da7893ad759aa69e7cb515

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fd30e5a3a74cad245ec72d20b6417b39242ffc54fa48a03389a6220bece888a0",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2026-07-23T03:32:22Z",
    "title_canon_sha256": "04dd69d7b65e041c0132d77101517cabbb7d57b03563b9cc578d42533eb87b67"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.20894",
    "kind": "arxiv",
    "version": 1
  }
}