Judul: Pelabelan Super Graceful Pada Graf Complete Bipartite, Graf Path, Dan Graf Regular Caterpillar
Abstrak: Pelabelan super graceful pada suatu graf merupakan pelabelan graf yang melabelkan simpul dan sisi, sehingga besar/nilai label pada sisi yang diperoleh merupakan selisih dari label simpul-simpul yang adjacent. Dalam karya ilmiah ini akan dibahas pelabelan super graceful pada graf Complete Bipartite, graf Path, dan graf Regular Caterpillar.
Keyword: pelabelan super graceful, graf complete bipartite, graf path, graf regular caterpillar

Judul: Pelabelan Properly Harmonis Genap pada Graf Path dan Graf yang Memuat Dua atau Tiga Caterpillar
Abstrak: Suatu fungsi 𝑓��� dikatakan sebagai pelabelan properly harmonis genap dari suatu graf 𝐺��� dengan 𝑞��� sisi jika 𝑓��� merupakan fungsi injektif dari himpunan simpulsimpul di 𝐺��� ke himpunan bilangan intejer dari 0 sampai 2𝑞��� − 1 dan fungsi 𝑓���∗ merupakan fungsi bijektif dari himpunan sisi-sisi di 𝐺��� ke himpunan bilangan intejer 0, 2, 4, … , 2(𝑞��� − 1) yang didapat dari penjumlahan dua label simpul yang insiden dengan sisi-sisinya dalam modulo 2𝑞���. Karya ilmiah ini akan menunjukkan bahwa graf path berorder 𝑚��� sebanyak 𝑛��� dan graf tak terhubung yang memuat dua atau tiga caterpillar memiliki pelabelan properly harmonis genap.
Keyword: graf caterpillar, graf path, pelabelan graf, pelabelan properly harmonis genap

Judul: Oil price and macroeconomics variables effects on stock price index (comparative study: South East Asia, East Asia, Europe, and America)
Abstrak: Crude oil is one factor that drive the world economy today. Its price performance is benchmark for the performance of the world economy because of its role is considered important in production process. Seven major stock indices in Asia has increased significantly as well as the increase in oil price since early 2002. Data shows since 2003 until 2008, Hang Seng rose 54,78 percent, BSE increased 71,22 percent, JKSE increased 74,80 percent, KLSE rose 45,06 percent, Nikkei rose 30,25 percent, Strait Times rose 49,33 percent, and KOSPI rose 57,27 percent. The improvement of global oil price followed by rising indices in Asia is not in accordance with the transmission mechanism and raises the question whether there is positive movement towards the oil price movement of stock price indices in Asia, whereas some countries in Asia are oil importers, particularly East Asia and India. Influence oil price on the economy may be different. Oil exporting countries got advantange from positive trends in oil price because of their income increases with rising oil price, while higher oil price would make oil importing countries have to pay more for their oil needs. The purpose of this study was to analyze how oil price and macroeconomic variables affect on stock price index in South East Asia, East Asia, Europe, and America countries. The data is monthly time series data from January 2000 until December 2009. Then, it analyzed using VAR/VECM with analysis tools IRF, and FEVD. The result showed that generally in Asia, stock price index in all Southeast Asia as well as India and South Korea would respond negatively to the oil price. If there were an increase in world oil price, it would lower the stock price index in each of these Asian countries. Stock price indices in European countries, namely FTSE, DAX, CAC, and SMI indicate different results. In general, FTSE, DAX, and SMI would positively respond to oil price movements, different from others, CAC would respond negatively. As in Europe, mostly stock price indices in America has also responded positively in oil price, except in Brazil which responded negatively.
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