Papers
Published or Accepted Papers
Watanabe, Kiwamu, Quadratic varieties of small codimension, [arXiv], to appear in SIGMA.
Watanabe, Kiwamu, Fano varieties of middle pseudoindex, Manuscripta Math. 175 (2024), no. 3-4, 1053–1061.
Takahashi, Yuta; Watanabe, Kiwamu; Fano 4-folds with nef tangent bundle in positive characteristic. Comm. Algebra 52 (2024), no. 7, 2750–2759.
Watanabe, Kiwamu; Positivity of the exterior power of the tangent bundles. Proc. Japan Acad. Ser. A Math. Sci. 99 (2023), no. 10, 77–80.
Kanemitsu, Akihiro; Watanabe, Kiwamu Projective varieties with nef tangent bundle in positive characteristic. Compos. Math. 159 (2023), no. 9, 1974–1999.
Watanabe, Kiwamu; Positivity of the second exterior power of the tangent bundles. Adv. Math. 385 (2021), 107757.
Watanabe, Kiwamu; Fano manifolds of coindex three admitting nef tangent bundle. Geom. Dedicata 210 (2021), 165–178.
Suzuki, Taku; Watanabe, Kiwamu; Varieties with nef diagonal. Internat. J. Math.31 (2020), no. 2, 2050011, 21 pp.
Occhetta, Gianluca; Sola Conde, Luis E.; Watanabe, Kiwamu Correction to: A characterization of symplectic Grassmannians. Math. Z. 292 (2019), no. 1-2, 569–570.
Occhetta, Gianluca; Sola Conde, Luis E.; Watanabe, Kiwamu Characterizing the homogeneous variety F4(4). Math. Nachr. 291 (2018), no. 14-15, 2334-2346.
Occhetta, Gianluca; Sola Conde, Luis E.; Watanabe, Kiwamu; Wisniewski, Jaroslaw A. Fano manifolds whose elementary contractions are smooth P1-fibrations: a geometric characterization of flag varieties. Ann. Sc. Norm. Super. Pisa Cl. Sci. (5) 17 (2017), no. 2, 573-607.
Occhetta, Gianluca; Sola Conde, Luis E.; Watanabe, Kiwamu; A characterization of symplectic Grassmannians. Math. Z. 286 (2017), no. 3-4, 1421-1433.
Watanabe, Kiwamu; Low-dimensional projective manifolds with nef tangent bundle in positive characteristic. Comm. Algebra 45 (2017), no. 9, 3768-3777.
Occhetta, Gianluca; Sola Conde, Luis E.; Watanabe, Kiwamu; Uniform families of minimal rational curves on Fano manifolds. Rev. Mat. Complut. 29 (2016), no. 2, 423-437.
Munoz, Roberto; Occhetta, Gianluca; Sola Conde, Luis E.; Watanabe, Kiwamu; Wisniewski, Jaroslaw A. A survey on the Campana-Peternell conjecture. Rend. Istit. Mat. Univ. Trieste 47 (2015), 127-185.
Watanabe, Kiwamu; Fano manifolds with nef tangent bundle and large Picard number. Proc. Japan Acad. Ser. A Math. Sci. 91 (2015), no. 6, 89-94.
Munoz, Roberto; Occhetta, Gianluca; Sola Conde, Luis E.; Watanabe, Kiwamu Rational curves, Dynkin diagrams and Fano manifolds with nef tangent bundle. Math. Ann. 361 (2015), no. 3-4, 583-609.
Watanabe, Kiwamu P1-bundles admitting another smooth morphism of relative dimension one. J. Algebra 414 (2014), 105-119.
Watanabe, Kiwamu Fano 5-folds with nef tangent bundles and Picard numbers greater than one. Math. Z. 276 (2014), no. 1-2, 39-49.
Watanabe, Kiwamu On projective manifolds swept out by cubic varieties. Internat. J. Math. 23 (2012),no. 7, 1250058, 22 pp.
Watanabe, Kiwamu Classification of embedded projective manifolds swept out by rational homogeneous varieties of codimension one. Pacific J. Math. 252 (2011), no. 2, 493-498.
Watanabe, Kiwamu A bound of lengths of chains of minimal rational curves on Fano manifolds of Picard number 1. J. Algebra 337 (2011), 224-232.
Watanabe, Kiwamu Lengths of chains of minimal rational curves on Fano manifolds. J. Algebra 325(2011), 163-176.
Watanabe, Kiwamu Actions of linear algebraic groups of exceptional type on projective varieties. Pacific J. Math. 239 (2009), no. 2, 391-395.
Watanabe, Kiwamu Classification of polarized manifolds admitting homogeneous varieties as ample divisors. Math. Ann. 342 (2008), no. 3, 557-563.
Preprints
Watanabe, Kiwamu, Extremal contractions and non-free rational curves on Fano varieties, September 8th, 2024, submitted.
Watanabe, Kiwamu, Fano varieties with pseudoindex equal to half of their dimension, Nov. 4th, 2024, submitted.