Question:  Do Robert A. Heinlein and Lyudmila Ulitskaya both write science fiction?

Context paragraphs:
Red Planet (novel): Red Planet is a 1949 science fiction novel by Robert A. Heinlein about students at boarding school on the planet Mars.  It represents the first appearance of Heinlein's idealized Martian elder race (see also "Stranger in a Strange Land").  The version published in 1949 featured a number of changes forced on Heinlein by Scribner's, since it was published as part of the Heinlein juveniles.  After Heinlein's death, the book was reissued by Del Rey Books as the author originally intended.

Free Men: "Free Men" is a science fiction short story by Robert A. Heinlein, which originally appeared in the Heinlein collection, "The Worlds of Robert A. Heinlein" (Ace F-375, 1966) and was later collected in "Expanded Universe".  It is copyrighted by Heinlein in 1966, but was probably written between 1947 and 1950, judging from the foreword to it in "Expanded Universe", which mentions that it was written after "Rocket Ship Galileo".

Robert A. Heinlein Award: The Robert A. Heinlein Award was established by the Heinlein Society in 2003 "for outstanding published works in science fiction and technical writings to inspire the human exploration of space."  It is named for prolific science fiction author Robert A. Heinlein and is administered by the Baltimore Science Fiction Society.  It is generally given annually to one or more recipients.

Tor Åge Bringsværd: Tor Åge Bringsværd (born 16 November 1939 in Skien, Norway) is an author, playwright, editor and translator.  He is perhaps best known for his speculative fiction.  Together with long-time partner Jon Bing, he is also considered as the first Norwegian author to write science fiction literature.  Bringsværd regards himself as an anarchist, which is clearly reflected in some of his works.  He is also known for his distinctive style of writing, for example for his seemingly random jumps to narratives or anecdotes with no clear relationship to the main story.

Matt Hughes (writer): Matthew Hughes (born 1949) is a British-born Canadian author who now lives wherever his secondary career as a housesitter takes him, while continuing to write science fiction under the name Matthew Hughes, crime fiction as Matt Hughes and media tie-ins as Hugh Matthews.  Prior to his work in fiction, he was a freelance speechwriter for corporate executives and politicians in British Columbia.

On the Writing of Speculative Fiction: On the Writing of Speculative Fiction is an essay by Robert Anson Heinlein, considered one of the key Science Fiction authors of the 20th century.  It was first published in 1947, also appearing in "Writing Science Fiction & Fantasy: 20 Dynamic Essays By the Field's Top Professionals" in 1993, and "The Nonfiction of Robert Heinlein: Volume I" in 2011.

Robert A. Heinlein: Robert Anson Heinlein ( ; July 7, 1907 – May 8, 1988) was an American science fiction writer.  Often called the "dean of science fiction writers", his sometimes controversial works continue to have an influential effect on the genre, and on modern culture more generally.

For Us, The Living: A Comedy of Customs: For Us, The Living: A Comedy of Customs is a science fiction novel by American writer Robert A. Heinlein, written in 1938 but published for the first time in 2003.  Heinlein admirer and science fiction author Spider Robinson titled his introductory essay "RAH DNA", as he believes this first, unpublished novel formed the DNA of Heinlein's later works.

Lyudmila Ulitskaya: Lyudmila Evgenyevna Ulitskaya (Russian: Людмила Евгеньевна Улицкая , born February 21, 1943) is an internationally acclaimed modern Russian novelist and short-story writer who, in 2014, was awarded the prestigious Austrian State Prize for European Literature for her oeuvre.  In 2006 she published "Daniel Stein, Interpreter" (Даниэль Штайн, переводчик), a novel dealing with the Holocaust and the need for reconciliation between Judaism, Christianity, and Islam.  Ulitskaya herself belongs to a group of people formed by the realities of the former Soviet Union, who see themselves ethnically and culturally as Jews, while having adopted Christianity as their religion.

Sydney J. Van Scyoc: Sydney J. van Scyoc (born July 27, 1939) is an American science fiction writer.  Her first published story was "Shatter the Wall" in "Galaxy" in 1962.  She continued to write short stories throughout the 1960s and in 1971, published her first novel, "Saltflower".  Other novels followed until 1992, when she abandoned writing to make and sell jewelry; she later returned to write science fiction.

Supporting paragraphs: Robert A. Heinlein Lyudmila Ulitskaya
Answer: no