Pith Number

pith:UHROHTYW

pith:2018:UHROHTYW3JIAWAYJEV5NPGQDIV

not attested not anchored not stored refs pending

A PDAE formulation of parabolic problems with dynamic boundary conditions

Robert Altmann

arxiv:1809.08841 v1 · 2018-09-24 · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UHROHTYW3JIAWAYJEV5NPGQDIV}

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	2026-05-18T00:05:03.397280Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a1e2e3cf16da500b0309257ad79a034557b1d98f7a9aae92bc4891b829b481c0

Aliases

arxiv: 1809.08841 · arxiv_version: 1809.08841v1 · doi: 10.48550/arxiv.1809.08841 · pith_short_12: UHROHTYW3JIA · pith_short_16: UHROHTYW3JIAWAYJ · pith_short_8: UHROHTYW

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/UHROHTYW3JIAWAYJEV5NPGQDIV \
  | 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: a1e2e3cf16da500b0309257ad79a034557b1d98f7a9aae92bc4891b829b481c0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "efe1314cd156d5c22b949ee92cbdc89cce6722ef5cbfaf5be9e90fd0463a8c81",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2018-09-24T11:14:04Z",
    "title_canon_sha256": "731a695b5c6ad529eeecf08986fc2bfb5086c3595e3d79787f8446c731ce51ff"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1809.08841",
    "kind": "arxiv",
    "version": 1
  }
}