Pith Number

pith:ZWZHMX5G

pith:2009:ZWZHMX5GO6CJCQ2BYWG7HH4RXN

not attested not anchored not stored refs pending

Sampling and reconstructing signals from a union of linear subspaces

Thomas Blumensath

arxiv:0911.3514 v2 · 2009-11-18 · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZWZHMX5GO6CJCQ2BYWG7HH4RXN}

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	2026-07-04T17:16:51.302697Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cdb2765fa67784914341c58df39f91bb4238a3efb1027ad0c8224bad6226cf49

Aliases

arxiv: 0911.3514 · arxiv_version: 0911.3514v2 · doi: 10.48550/arxiv.0911.3514 · pith_short_12: ZWZHMX5GO6CJ · pith_short_16: ZWZHMX5GO6CJCQ2B · pith_short_8: ZWZHMX5G

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/ZWZHMX5GO6CJCQ2BYWG7HH4RXN \
  | 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: cdb2765fa67784914341c58df39f91bb4238a3efb1027ad0c8224bad6226cf49

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3bcd7b72a1193d03413200a403fa90dc659722883820914e1cf7dbdf7c88ecbc",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2009-11-18T11:53:50Z",
    "title_canon_sha256": "6e69dbbd88526880861424426943765c17063a165dd66ffcf5fa436b38891a73"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0911.3514",
    "kind": "arxiv",
    "version": 2
  }
}