Faculty recital: Hung-Kuan Chen, March 18, 1990

This is the concert program of the Faculty Recital: Hung-Kuan Chen performance on Sunday, March 18, 1990 at 8:00 p.m., at the Tsai Performance Center, 685 Commonwealth Avenue, Boston, Massachusetts. Works performed were Nocturne, Op. 31 by Lowell Liebermann, Sonata in B-flat major, Op. 106 "Hammerklavier" by Ludwig van Beethoven, Nocturne in E-flat Major, Op. 55 No. 2 and Nocturne in C minor, Op. 48 No. 1 by Frédéric Chopin, and Variations on a Theme by Paganini, Op. 35 by Johannes Brahms. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund

Faculty recital: Hung-Kuan Chen, piano, October 29, 1986

This is the concert program of the Faculty Recital: Hung-Kuan Chen, piano performance on Wednesday, October 29, 1986 at 8:00 p.m., at the Concert Hall, 855 Commonwealth Avenue. Works performed were Sonata Op. 111 in C minor by Ludwig van Beethoven, "Gaspard de la Nuit" by Maurice Ravel, and Sonata in G minor by Franz Liszt. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund

Faculty recital: Hung-Kuan Chen, piano, February 4, 1987

This is the concert program of the Faculty Recital: Hung-Kuan Chen, piano performance on Wednesday, February 4, 1987 at 8:00 p.m., at the Concert Hall, 855 Commonwealth Avenue. Works performed were the following by Ludwig van Beethoven: Sonata Op. 10, No. 1 in C minor, Sonata Op. 27, No. 1 in E-flat major Quasi una Fantasia, Sonata Op. 54, in F major, and Sonata Op. 106 in B-flat major Hammerklaviersonata. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund

Homology and K-theory of the Bianchi groups

We reveal a correspondence between the homological torsion of the Bianchi groups and new geometric invariants, which are effectively computable thanks to their action on hyperbolic space. We use it to explicitly compute their integral group homology and equivariant $K$-homology. By the Baum/Connes conjecture, which holds for the Bianchi groups, we obtain the $K$-theory of their reduced $C^*$-algebras in terms of isomorphic images of the computed $K$-homology. We further find an application to Chen/Ruan orbifold cohomology. % {\it To cite this article: Alexander D. Rahm, C. R. Acad. Sci. Paris, Ser. I +++ (2011).

Peramalan Harga Ethereum Menggunakan Chen Fuzzy Time Series dengan Fuzzy C-Means Clustering (FCM)

Peramalan biasanya digunakan untuk meramalkan sesuatu yang akan terjadi di masa depan menggunakan data historis yang sudah ada. Penelitian ini bertujuan untuk meramalkan harga Ethereum menggunakan data historis pada bulan November 2021, terdapat tiga jenis data yang dipakai, yaitu open, high, dan low. Pada penelitian ini digunakan Chen fuzzy time series dengan fuzzy c-means clustering (FCM) untuk mencari intervalnya dan single exponential smoothing (SES) sebagai pembandingnya. Perhitungan menggunakan metode Chen fuzzy time series dengan fuzzy c-means clustering (FCM) dan single exponential smoothing (SES) didapatkan ramalan harga Ethereum pada tanggal 1 Desember 2021 untuk nilai open, high, dan low. Selanjutnya dihitung nilai average forecasting error rates (AFER) dari metode Chen fuzzy time series dengan fuzzy c-means clustering (FCM) dan metode single exponential smoothing (SES). Nilai AFER dari metode Chen fuzzy time series dengan fuzzy c-means clustering (FCM) untuk nilai open, high, dan low adalah {2,763%, 2,044%, 1,787%} sedangkan nilai AFER dari metode single exponential smoothing (SES) untuk nilai open, high, dan low adalah {3,063%, 2,336%, 2,870%}. Ini berarti bahwa peramalan dari Chen fuzzy time series dengan fuzzy c-means clustering lebih baik daripada single exponential smoothing dalam meramalkan harga Ethereum pada bulan November 2021