Pith Number

pith:RQX4TPXI

pith:2009:RQX4TPXIFQFAOUTKUNRSGFSJDI

not attested not anchored not stored refs pending

Error bounds for spectral enhancement which are based on variable Hilbert scale inequalities

Markus Hegland

arxiv:0911.2695 v1 · 2009-11-13 · 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{RQX4TPXIFQFAOUTKUNRSGFSJDI}

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	2026-06-03T23:06:30.650277Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8c2fc9bee82c0a07526aa3632316491a2e2a700347c3cb99e1dc9f97cff9ac8f

Aliases

arxiv: 0911.2695 · arxiv_version: 0911.2695v1 · doi: 10.48550/arxiv.0911.2695 · pith_short_12: RQX4TPXIFQFA · pith_short_16: RQX4TPXIFQFAOUTK · pith_short_8: RQX4TPXI

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/RQX4TPXIFQFAOUTKUNRSGFSJDI \
  | 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: 8c2fc9bee82c0a07526aa3632316491a2e2a700347c3cb99e1dc9f97cff9ac8f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ce48e227e619ab0d8c82865e3757616ac8b5c4f06d0965a734dac0f56d6afc38",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NA",
    "submitted_at": "2009-11-13T20:49:51Z",
    "title_canon_sha256": "025723610e2c0f5a9f3f39deb70ca7b3524066e7279888426c3c69817384bfa2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.2695",
    "kind": "arxiv",
    "version": 1
  }
}