Pith Number

pith:6RE7QZEX

pith:2017:6RE7QZEXHE5OMPOW6Z7NHCI3VW

not attested not anchored not stored refs pending

HDG-POD Reduced Order Model of the Heat Equation

Jiguang Shen, John R. Singler, Yangwen Zhang

arxiv:1801.00079 v1 · 2017-12-30 · 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{6RE7QZEXHE5OMPOW6Z7NHCI3VW}

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	2026-05-18T00:00:02.361068Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

f449f86497393ae63dd6f67ed3891bad9a9d96ce914f2ef374eef970fca7b477

Aliases

arxiv: 1801.00079 · arxiv_version: 1801.00079v1 · doi: 10.48550/arxiv.1801.00079 · pith_short_12: 6RE7QZEXHE5O · pith_short_16: 6RE7QZEXHE5OMPOW · pith_short_8: 6RE7QZEX

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/6RE7QZEXHE5OMPOW6Z7NHCI3VW \
  | 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: f449f86497393ae63dd6f67ed3891bad9a9d96ce914f2ef374eef970fca7b477

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f14e2852a3383c00bc4915b5c83506745745077883d4c2cb0599f9fb0988afec",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2017-12-30T03:28:44Z",
    "title_canon_sha256": "6cdf4f1de822d115cd9691a7040f3cbdcf34e733de4d20fac783e547b0d14f85"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.00079",
    "kind": "arxiv",
    "version": 1
  }
}