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</html><description>Hace unos d&#xED;as rese&#xF1;ab&#xE1;mos en Matem&#xE1;ticas y sus fronteras esa excelente novela de Juan Perucho, Las historias naturales, una historia vamp&#xED;rica en la Espa&#xF1;a de las guerras carlistas del siglo XIX, y nos centr&#xE1;bamos en el matem&#xE1;tico ficticio Segismundo Ferrer. Vamos a comentar hoy algunos teoremas sobre vampiros. &nbsp; Como sabemos por la literatura y el cine, alguien se convierte en vampiro si sufre una mordedura de uno de ellos. Por otra parte, los vampiros necesitan chupar sangre humana para subsistir. La pregunta que nos hacemos es si los vampiros podr&#xED;an existir (y no nos referimos a la especie de&#x2026;</description><thumbnail_url>http://www.madrimasd.org/blogs/matematicas/files/2021/11/C-Efthimiou.jpg</thumbnail_url></oembed>
