Pith Number

pith:DWPQ4YPS

pith:2006:DWPQ4YPS23FXWY6J2LX6QZFGRC

not attested not anchored not stored refs pending

A Non-Existence Result for Hamiltonian Integrators

P. F. Tupper

arxiv:math/0607641 v1 · 2006-07-25 · math.NA · cs.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{DWPQ4YPS23FXWY6J2LX6QZFGRC}

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	2026-06-03T22:06:20.228141Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1d9f0e61f2d6cb7b63c9d2efe864a6889b56a811464dc616c9ef3e9c4281cbce

Aliases

arxiv: math/0607641 · arxiv_version: math/0607641v1 · doi: 10.48550/arxiv.math/0607641 · pith_short_12: DWPQ4YPS23FX · pith_short_16: DWPQ4YPS23FXWY6J · pith_short_8: DWPQ4YPS

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/DWPQ4YPS23FXWY6J2LX6QZFGRC \
  | 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: 1d9f0e61f2d6cb7b63c9d2efe864a6889b56a811464dc616c9ef3e9c4281cbce

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "67060d0ae562bbf6dcc95be738afd3ebab52bdad42d5d60d5f89c91e3ae329d0",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "",
    "primary_cat": "math.NA",
    "submitted_at": "2006-07-25T19:43:08Z",
    "title_canon_sha256": "96f02b8bb3256390b0ee3896378861ac0a0b43a14042204496602e104558a691"
  },
  "schema_version": "1.0",
  "source": {
    "id": "math/0607641",
    "kind": "arxiv",
    "version": 1
  }
}