Pith Number

pith:NIHFMXE2

pith:2017:NIHFMXE24IVNP5GISMNS5JVF3C

not attested not anchored not stored refs pending

Four approaches to cohomology theories with reality

J.P.C. Greenlees

arxiv:1705.09365 v3 · 2017-05-25 · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NIHFMXE24IVNP5GISMNS5JVF3C}

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	2026-05-18T00:32:20.510382Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6a0e565c9ae22ad7f4c8931b2ea6a5d89d3a760b7f2becbcd4f0215303f8df79

Aliases

arxiv: 1705.09365 · arxiv_version: 1705.09365v3 · doi: 10.48550/arxiv.1705.09365 · pith_short_12: NIHFMXE24IVN · pith_short_16: NIHFMXE24IVNP5GI · pith_short_8: NIHFMXE2

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/NIHFMXE24IVNP5GISMNS5JVF3C \
  | 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: 6a0e565c9ae22ad7f4c8931b2ea6a5d89d3a760b7f2becbcd4f0215303f8df79

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b507447b88d67b54ead0dd708115ee90c0c6cae3df454a7b483df3e0477a1d60",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2017-05-25T21:13:42Z",
    "title_canon_sha256": "669bb45f9462d15361b5dec822bfe1dd101bbd2e3dc67e341a748b1d465b8191"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1705.09365",
    "kind": "arxiv",
    "version": 3
  }
}