Pith Number

pith:OUSSWPLD

pith:2026:OUSSWPLD7KV6W4HQMEBIQOBEXR

not attested not anchored not stored refs pending

A model and a finite element approximation of the mixed-dimensionality diffusion problem

David Portillo, Ignacio Romero

arxiv:2608.06976 v1 · 2026-08-07 · math.NA · cs.NA · math-ph · math.MP

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{OUSSWPLD7KV6W4HQMEBIQOBEXR}

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	2026-08-10T01:12:42.722670Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

75252b3d63faabeb70f06102883824bc79aee8962191e3b81f8e7ac73b7cf061

Aliases

arxiv: 2608.06976 · arxiv_version: 2608.06976v1 · doi: 10.48550/arxiv.2608.06976 · pith_short_12: OUSSWPLD7KV6 · pith_short_16: OUSSWPLD7KV6W4HQ · pith_short_8: OUSSWPLD

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/OUSSWPLD7KV6W4HQMEBIQOBEXR \
  | 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: 75252b3d63faabeb70f06102883824bc79aee8962191e3b81f8e7ac73b7cf061

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "130966c8a56491d42170670f8641f87e453a8e9c92dcaf3150f5504431bb29fb",
    "cross_cats_sorted": [
      "cs.NA",
      "math-ph",
      "math.MP"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2026-08-07T08:54:09Z",
    "title_canon_sha256": "dbf1b289f26902d11a60bebde103256eb82cf90633fa508ce026ddf8c09a8843"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2608.06976",
    "kind": "arxiv",
    "version": 1
  }
}